This forum has some really weird ideas about what constitutes "abandoned..." So basically, any game that does not get any updates (and I mean any kind of updates, i.e. patches, new content, or even dev notes on Patreon, etc.) during a...uhh...three month period I think? They get marked as abandoned, basically. Even if the developer in question has said just before the cutoff point that they are working furiously on the game, but need time off due to, say... Moving to a new home or something.
So yeah. Weird.
-Mal