Quoting: Cyril@Stella Is the reason, by any chance, is that they won't accept players modding their game? 2 DRM is indeed awful, first time I hear about Capcom Protector it seems.

You can still mod the game but adding DLC content will get you banned. I've modded the game in the past to buy any item so I could complete event armor sets, So I can have longer hair for my character and try the decompressed textures to improve frame times. Tho I don't get why decompressed textures are so unstable under linux one launch it no issue the next launch suddenly it thinks the texture is corrupt. That doesn't happen on Windows.

From my understanding they did make it harder to mod their games after a naked Chung Li mod was show live at a tournament.