If they can get the service provider to kick them off, they will. If all else fails, they will get the credit card company to refuse to do business with them. They did that for legal gun dealers.
The left is proving beyond any doubt that even the illusion of “free speech” is going to disappear and real soon. After that, fascism becomes the form of government.
“they will get the credit card company to refuse to do business with them”
That already happened. You can only donate , pay for their pro account or buy their merch by check or bitcoin.