It is intentionally vague, because companies want to be able to weasel out of any and all accountability whenever possible.

But Mastercard isn’t off the hook either way even if we accept the rules as they are currently. Before this incident, Mastercard has been starting to censor adult content in general with rules changes. To the point where there was already a petition on the ACLU site about this exact type of censorship.

…aclu.org/…/mastercard-sex-work-work-end-your-unj…

Mastercard is trying to weasel their way out of this particular instance because they didn’t directly have a hand in this video game situation, even though they clearly would agree with it based on other recent changes. They’re trying to play both sides by assuming that people didn’t know they were already doing these things.