Answering the question in your topic title, they're all safe to use. Because Valve's definition of safety isn't going to revolve around your values or decisions as a customer of another business.

Originally posted by nullable:

Answering the question in your topic title, they're all safe to use. Because Valve's definition of safety isn't going to revolve around your values or decisions as a customer of another business.

This is disappointingly unhelpful.
However, I appreciate you pointing out that the term 'safe to use' probably doesn't quite express my concern.

Valve itself played the morale police multiple times
Sofortüberweisung in the list

this is pure comedy

Originally posted by Helvetson:

Since those new business practices aren't mentioned in neither of the above mentioned corporations' promotion material though, I

You know... Corporations usually wont write contractual stuff into their promotion materials.

Originally posted by T9:

Sofortüberweisung in the list

this is pure comedy

It was kinda meant to be, yes.
Still with a grain of sincerity though, to have myself and others, who also don't want to continue supporting this kind of corporations, maybe informed a little better.

WOW!
Thank you, Sir, thank you sincerily for all your effort in researching all of this!

Originally posted by Chronocide:

EPS rules: website displays Visa and Mastercard "marks" which means they comply to visa/mastercard policy

Paysafecard rules: appears to be a subgroup of the Bancorp bank, which does issue mastercards, so would be bound by their policy.

Well, that's disappointing... I really thought one those might be a good alternative.

Originally posted by Chronocide:

Trustly rules: Not finding anything specific to porn, but they are very clear that you have to be 100% honest about everything and that you cannot use the service for "unlawful" or for "abusive" purposes.

Hm, I guess unlawful or abusive stuff is - and should be - hard to obtain anyway, no issues with that... Promising?

Originally posted by Chronocide:

Webmoney rules: https://www.webmoney.com/eng/help/general/tabu.shtml

Next to useless - what do they mean I can't buy human body parts and remains?
But seriously, that's one damn long list of prohibitions there - take note of the Addendum 2:
https://www.webmoney.com/eng/legal/transfert.shtml

Originally posted by Chronocide:

Sofortüberweisung....can't seem to find that one as an institution of their own. If you mean Stripe, Stripe specifically can't be used on steam because steam sells pornography: https://stripe.com/legal/restricted-businesses#prohibited-businesses

I have some information on Sofortüberweisung myself, actually:
The original company was taken over by swedish payment service provider Klarna a decade ago. Klarna again was sentenced for violating the EU GDPR[www.edpb.europa.eu], and, at least in Germany and Austria, has often been subject to allegations of collecting and redistributing it's customers' bank account data[www.computerbild.de] (didn't find anything in English on this topic).
So, there's a bunch of different issues with Klarna, I'm afraid.

Originally posted by Chronocide:

JCB: I couldn't find anything specific, but since this is the Japan Credit Bureau, I would imagine they are subject to japan's rather harsh rules regarding pornography.
https://en.wikipedia.org/wiki/Censorship_in_Japan#:~:text=Main%20article:%20Pornography%20in%20Japan,materials%20distributed%20by%20electronic%20means.

I did find that the JCB card has an interesting subset of rules on certain types of pornography
https://www.global.jcb/en/merchants/requirements/index.html which are unclear if they apply to computer games.

Well, since they offer their services on Steam I assume they don't... Or they simply don't know or care. I don't care about porn either, what I do care about though is them not having a "whatever might harm the brand" bs rule, that's something

Again, thank you very much for your research, I hope all of this will help some people.
It certainly helped me.