It is because homophobic fundamental Christian Karens with nothing better to do issue complaints. There is an army of homophobes (mostly women) who have dedicated their lives to trying to rid the world of porn. They lobbied hard to get OF shut down and very nearly succeeded. But since OF's lawyers out-smarted them, they have instead resorted to spamming mass-reports until Elon Musk takes down the reported accounts. And it isn't just OF. I have a friend who just posts pictures of him working out. But because they know he's gay they target his account. He gets shut down on FB and Twitter several times a year for harmless completely SFW content.