Last updated: October 30, 2026

This explains what happens to personal data when you use martechtherapy.com, the tools published alongside it, or the LinkedIn application described below. It is written to be read rather than to be survived, so if something here is unclear, ask me and I will fix the wording.

Who is responsible

Martech Therapy, sole practitioner, registered in the Netherlands under Chamber of Commerce number 62437542, at Van Tijenstraat 44, Delft, Netherlands, is the data controller for everything described here.

Contact: privacy@tagticians.com

I run this myself. There is no support desk, and mail to that address reaches me directly.

What this covers

  • martechtherapy.com
  • secondlaw.martechtherapy.com (Entropy Scan)
  • cdpsimulator.martechtherapy.com (CDP Simulator)
  • workshop.martechtherapy.com (Martech Workshop)
  • martechfoundry.com
  • The LinkedIn application described under "The LinkedIn application" below
  • The YouTube uploader described under "YouTube" below

When you read something

The site runs on Ghost. Loading a page creates a server log entry containing your IP address, the page requested, the time, and your browser's user agent. Those logs exist so the site can be kept running and abuse can be investigated. They are held for 14 months and are not used to build a profile of you.

Analytics are collected through Posthog to count page views and see which articles get read. Cookie-based. This tells me what to write more of. It does not tell me who you are.

When you subscribe

Subscribing to the newsletter stores your email address, the date you subscribed, and which emails you opened or clicked. That last part is how I judge whether an issue was worth sending. Email is delivered through Ghost, Google, and PostmarkApp.

Every email carries an unsubscribe link, and using it removes you immediately. You do not need to email me first, and I do not ask why.

When you use one of the diagnostics

The Entropy Scan, the CDP Simulator and the Workshop tools ask you questions and give you a result. Your answers are stored so the result can be produced and, if you asked for it by email, sent to you.

Answers are used in aggregate to improve the diagnostics themselves, for example to see which questions confuse people. Aggregate means counts across everyone who has taken it, with no way back to an individual. Your individual responses are not published, sold, or shared, and they are not shown to any client of mine.

If you gave an email address to receive your result, that address is stored with your responses. If you did not, the responses are not linked to an identity.

The LinkedIn application

I operate an application that uses LinkedIn's Member Data Portability API, made available by LinkedIn under the EU Digital Markets Act. It exists for one purpose: to help a writer check new drafts against their own published writing, so their voice stays consistent.

It only ever runs on data belonging to the person who authorized it. There is no route through the application to anyone else's LinkedIn data, and it does not read your connections, your feed, or anyone else's posts.

What it requests. Only these categories of your own LinkedIn data:

  • Your own posts and reshares, including their text, date and link
  • Articles you have authored on LinkedIn
  • Comments you have written

The list of categories is fixed in the application's source code rather than configured at runtime, so it cannot request a category outside that list even by mistake. It does not request, receive, or store your messages, your connections, your contacts, your phone numbers, your private notes, your search history, or your advertising data, although the LinkedIn permission would technically permit some of these.

Why. Your own writing is measured for style: sentence length, how often you use contractions, how directly you address the reader, which phrases you repeat. Those measurements are compared against new drafts to flag where a draft does not sound like you. Nothing is published, and no content is generated and posted on your behalf.

Where it is stored. On infrastructure I control, at corpus.martechtherapy.com, reachable only over HTTPS and only with an access token. It is not stored on a third-party analytics platform, and it is not sent to any advertising network.

What it is never used for. Your LinkedIn data is not sold, not shared with third parties, not used for advertising or ad targeting, not used to train machine learning models offered to anyone else, and not used to build a profile of you for any purpose other than the style comparison described above.

How to stop it. You can withdraw authorization at any time from LinkedIn, under Settings, then Data privacy, then Permitted services. That immediately ends the application's access. To also have data already retrieved deleted, email privacy@tagticians.com and it will be deleted within 30 days.

How long it is kept. Retrieved posts are kept while the authorization stands, because the comparison relies on the full history. If authorization is withdrawn and deletion requested, everything retrieved is deleted. If authorization is withdrawn and nothing is requested, the data is deleted after 14 months.

YouTube

I publish videos to the Martech Therapy YouTube channel with a small tool of my own that uses YouTube API Services. It uploads my videos to my own channel, with their titles, descriptions, thumbnails and captions, and adds them to a playlist. Only I use it, and only on my own channel.

It does not access anyone else's YouTube account, and it does not collect data about the people who watch the videos. The only YouTube data it keeps is the ID of each video I upload, so my sites can link to it.

Watching a video on YouTube, or on a page where one is embedded, is covered by the YouTube Terms of Service and the Google Privacy Policy, not by this page.

The tool's access can be withdrawn at any time from the Google security settings page. To have stored data deleted, email privacy@tagticians.com and it will be deleted within 30 days.

Who else processes data

To run any of this, some data passes through service providers who process it on my instructions:

  • Ghost Pro for website hosting and newsletter delivery
  • Posthog for site analytics
  • Hostinger
  • LinkedIn, as the source of data in the application described above
  • Google, through YouTube API Services, for publishing videos to the Martech Therapy channel

Each of these is bound by a processing agreement. I do not sell personal data to anyone, and there is no arrangement under which anyone pays me for access to it.

Transfers outside the EEA

Some of those providers, such as LinkedIn and Google, operate outside the European Economic Area. Where that happens, transfers rely on the European Commission's Standard Contractual Clauses or an adequacy decision.

Your rights

Under the GDPR you can ask me to show you what data I hold about you, correct it, delete it, restrict what I do with it, or send it to you in a portable format. You can object to processing based on legitimate interests, and you can withdraw consent at any time where consent is what permits the processing.

Email privacy@tagticians.com and I will respond within 30 days. There is no charge, and I will not ask you to justify the request.

If you are not satisfied with how I handled it, you can complain to the Autoriteit Persoonsgegevens in the Netherlands.

Site logs and analytics rest on legitimate interest in keeping the site running and understanding what gets read. The newsletter rests on your consent, given when you subscribed. Diagnostic responses rest on your consent, given when you started the diagnostic. The LinkedIn application rests on your explicit authorization through LinkedIn, which you can withdraw at any time. Publishing my own videos through YouTube API Services rests on legitimate interest in running my own channel; it processes no personal data about viewers.

Cookies

Ghost and Posthog set a session cookie for signed-in members and a cookie to remember newsletter preferences.

Children

None of this is aimed at anyone under 16, and I do not knowingly collect data from them.

Changes

If this changes in a way that affects what happens to your data, the date at the top changes and the change is described here. Material changes to the newsletter or the LinkedIn application will be sent to affected people directly rather than left for you to notice.