This seems a bit of an odd take. Matrix.org making their server freemium is up to them - charging some users to use the service (not the software) is a way of keeping the lights on. Better that than ads or selling user data. Lots of privacy focused orgs do the same - Proton, Tuta, Mailbox, Mullvad, IVPN. If people also have an issue with Element - don’t use Element, use one of the other apps.

If people are this upset, its not impossible (or even that hard) to migrate to a different server - or host your own.

I’ll see your Star Trek and raise you The Culture.

I realise that as individuals without the huge resources of a business your options are limited. I also have a lot of sympathy with the admins and mods being exposed to that shit. I don’t know what the answer is but I don’t think blanket silencing all users who care about their privacy is a solution.

The code on the card is covered so Amazon might know you use Mullvad but they have no way of knowing what your account is.

Mullvad know your acct but they have no way of knowing how it is you paid other than maybe it being a scratchcard which they don’t track anyway.