What Itch just did is more than likley going to kill them, Tumblr did the same, and look where they are now, have fun watching your service crash and burn,
I think people are being absolutely ridiculous in these threads to blame Itch for anything beyond how they initially handled it. It's unfair to suggest that Itch should have fought back on this matter, and it would have been an irresponsible move on their part. The whole website, and all of its developers who rely on it, should not be killed because Itch decided to stand up for a portion of its developers.
I have developer friends of whom this affects. I fear for what might happen to their games. I am angry that this is happening, but what good does it do to go after the people with the guns to their heads and not the people holding the guns?