

I think there could be more to it. Louis Rossmann had personal issues with the lead dev there a year or two ago due to how they interact in their forum, and I think he had some great reasons to be concerned. Since then the lead dev has stepped away as project lead, but I doubt the bad blood is completely gone.
I think it’s a bit suspicious that they don’t mention what feature(s) FUTO wanted. Given their interaction with other projects, I’m guessing they wanted a “supporter” badge for people who have bought the software (no change in functionality other than the badge). I’m guessing also that due to their interaction with Rossmann, they’re uninterested in clarifying, esp. if it would put FUTO in a better light if they did.
Then again, maybe FUTO is a bunch of scumbags. It just seems the slant against them is so much stronger than the actual negative impact from a handful of repos having source-available licenses instead of FOSS licenses.

And even then, most games are available on multiple platforms, for similar prices. So you can get the same game from Steam, GOG, or EGS in many cases, plus all of the stores that sell Steam keys (and Steam probably doesn’t get a cut of those sales).