Interesting system! Correct me if I'm wrong though, but buying credits does look like it's not an automatically recurring payment (to buy credits), so that makes sense (they do keep the receipts though according to their privacy policy. Decoupled from the account, but they do keep data).

That's a bit different from Proton's credit card payment method (which is the case here) that automatically recurs. If Posteo offered automatically recurring payments, they'd have to save payment data as well (which they also explain in the privacy policy).

To be clear, Proton does also offer more private ways of paying. Paying by credit card is not the only option. Bitcoin or cash is also possible. I just found out that Proton does also actually offer a credit system as well, but it's unclear to me if that's decoupled or not. Definitely a place where they could do better.

[–] leadore@lemmy.world 1 points 11 hours ago

Right, it's not automatically recurring. If you get below some number of credits (I forget how many), they notify you (by email of course!) so you have plenty of time to buy some more.