Steam and itch.io aren't the problem. Visa, Mastercard, and Paypal are. Among other paypment processing companies. They're acting like the mafia and strong-arming these sites to remove content they dislike. Even though it's legal.
I just don't like the fact that these companies are starting to interfere with what or where I can or cannot spend my money, it's dystopian to the point of being scary.