The reason the banks, and through the banks OnlyFans, attack sex is because they are accountable, and don't wish to take risks unless they are very profitable risks. The real danger of platforms and banks is how happy they are to censor for the government, or simply the loudest, richest mouth, in order to keep the profit flowing. If you want to fix it, you put in legal protections for people to do business, rather th…
I think it is about charge backs. Visa and mastercard hate charge backs. Porn has a very high charge back rate and these cost card companies so much they will often just cancel the merchant agreement. With a charge back there is human customer service involved, customer denials, fraud and complicated dispute resolution. This is why the processors that specialize in porn (ccbill) charge up to %15 per transaction. I don't think the processors wanted to go after onlyfans - they just would rather not deal with the drama. However, like onlyfans discovered, if you offer to pay a %15 per transaction fee - processors will work with you. Processors do not have morals - they are just trying to make money. They don't mind handling transactions for gun sales, tobacco, strip clubs or pyramid schemes.