Of course. If you have hundreds of thousands of dollars in a PayPal account, they have the highest possible leverage over you: they are literally holding your money. If you have a Steam account with hundreds of video games on it and an estimated value of tens of thousands of dollars, you're obviously not going to screw around and risk getting banned. Once money has exchanged hands, it becomes serious business.

There's no reason to care about some random blog or forum's terms of service though. Block their ads and surveillance capitalism all you want, they can do nothing.