itch.io

In terms of if no one was forcing them to react fast - we don't know. There are already speculations they might have gotten a legal letter first, which could spearhead it way faster than Steam and as much as we can hate them going for the safe route, I wouldn't want to lose ability of my business to actually pay the bills.
In terms of what we can do - other than spreading the information and making the knowledge of the issue widespread in general population, by reaching whoever we can, we can as well try to move some law making process. Since I imagine you aren't in US or UK to sign petitions, if people would be willing someone could start EU Initative to challenge it legally speaking. If Stop Killing Games with their EU Initative could gather so many votes and might have a chance to do something with it, maybe we could try the same. Though obviously it would require way more effort than just spreading the word.