Fight Back
There are a few campaigns to stop this…
Change Org : https://chng.it/GPJgRVgSsK
ACLU : https://action.aclu.org/petition/mastercard-sex-work-work-end-your-unjust-policy
Apparently the following discusses the process in the EU:
https://www.reddit.com/r/gamedev/comments/1m8t8ci/heres_how_to_contact_european_parliament/