Indeed. The sources I’ve read seem to lay blame with games not usually patenting mechanics (which apparently is all patent officers look at for prior art, not other games), meaning it needs active challenging to be thrown out.

PocketPair is based in Japan, which is where the previous, more directly problematic patents have been filed mid-litigation. While there is clearly prior art for the US patent, it isn’t quite as comically broad as the Japan ones, and since Japan doesn’t seem to care about prior art, those remain the most concerning to me.