My criticism is more than you selecting a provider, not paying for it, know what the problem is then complain it’s not what you need despite knowing it in advance.

I was a paying customer. I was not aware of this functionality being paid. If I had been aware, I wouldn’t have used Proton addresses. Now I’m facing the consequences after switching. Others have commented being in the same position,

you can see from the total number of downvotes to your post and the upvotes on my comments

If you think I care, you’re wrong. The point of this post is to remind and inform, not argue over technical definitions. If it helps one person then it’s served its purpose

Is anyone aware of a third-party service for tracking YouTube watch history across devices? That’s the missing piece keeping me from switching

I have Proton Mail addresses using my domain.

Those are your addresses then not Proton’s. Hence why switching is easy and is irrelevant to my complaint which is specific to the domains listed

Wikipedia says…

In economics, vendor lock-in, also known as proprietary lock-in or customer lock-in, makes a customer dependent on a vendor for products, unable to use another vendor without substantial switching costs.

If I want to switch away I have to pay every month in perpetuity to deliver emails to my new provider. In other words, I’ll always have to be a customer

Thank you, that’s a great callout

It was a sub-brand of Lego. Saved them from going under actually. Then discontinued and later rebooted (with different designs and parts) and rediscontinuted.

Here’s a good doc on the subject: https://www.youtube.com/watch?v=126bLUkHuNI