My French is not good enough yet to reply mais: C’est le cas partout. Credit card companies have turned into the purity police on all these platforms. If the platform allows NSFW, these companies bail out. People who work in the sex industry (fully legally) also have a hard time being accepted into banks. It’s a shitshow.
Read your contract. Termination notice times should be written down in either your contract or the company’s AGB.