I suspect Putin made him a better offer and wrote him a bigger check or this was some kind of planned nonsense to get traitors to reveal themselves..... I also think the Chef was smart enough to see Chechens on the horizon and NOBODY wants to tangle with them.
How serious was this? Who knows, but keep in mind that Wagner now controls the logistics pipeline for Russian forces in the Ukraine (Rostov) and the crossroads of Crimea. Hard to find a better position to have a say in the Ukraine than the one he currently occupies if he can keep his head and he has more control over resupply than the Russian generals at the moment.
I am not sure what to make of this.
It looks to me like this guy Prigohzin is toast. I don’t think the Putin/Russian Crime Syndicate will let him live.