Yeah, can you imagine if Kat told everyone that he spends all his money on WWE Champions and he doesn't fuck her?! That would be devastating and ruin his career.
I mean we already have the fact that Phil used TheyCallMeDSP as his Champs username, the bank leaks, TJGamebox's tracking of his spending, the account only playing when he's not on camera, and that time he accidentally showed the game on his stream.
And then we have videos of Leanna saying they didn't have sex, Phil admitting on his debunk stream that they didn't have sex, the leaked video of Phil rubbing his tiny dick through his shorts, Phil admitting he researched penis enlargement, and the fact that he spent his wedding night Tweeting instead of having sex.
So yeah, besides all those things, I think Kat is blackmailing Phil to reveal that he plays WWE Champions and has a tiny dick. Because that makes perfect sense if you don't think about it.