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Valve nukes a CSGO mod 8 years into its development
(wccftech.com)
Tabletop, DnD, board games, and minecraft. Also Animal Crossing.
3rd International Volunteer Brigade (Hexbear gaming discord)
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While there aren't any great sources in here, it seems a little more complicated than "Valve hates them arbitrarily."
It's more than likely just gross incompetence from valves flat structure management.
Also Valve doesn't need to do anything when they have such a pervasive cult of personality.
Their FAQ says they've never used any leaked code. It's incredible that there are always people defending Valve for doing and being everything they otherwise hate.