For Steam, it looks like Collective Shout, NCOSE, and Exodus Cry are behind this particular push. [1]
[1] https://www.vice.com/en/article/group-behind-steam-censorshi...
[1] https://www.vice.com/en/article/group-behind-steam-censorshi...
Interesting that it's 404? Fact check? Retract? Lawsuit?