Why would they? They still get a %30 cut of those $70 games. Blacklisting them would just be giving GoG and Epic a leg up in being the only stores you can play Sony blockbusters.

Just a reminder that the steam Refund policy in America is illegal everywhere else in the world. They aren't this great company that's consumer first. They are trying to make as much money as possible and have Allowed the likes of 2k games and EA to be as scummy as possible on their platform.