IMHO Visa and Mastercard duopoly are way more powerful than other companies like Facebook or Google. In the end, people still need to pay for services and they use credit cards to pay for it. If Mastercard or Visa don't want a service do exist, they can simply block it and then people won't be able to use the service. The recent OnlyFans and PornHub controversies prove my point. OnlyFans was in the verge of banning explicit porn in their plataform.
https://www.protocol.com/policy/onlyfans-visa-mastercard