Koepka has joined LIV. So that's now Dustin Johnson, Bryson DeChambeau, Brooks Koepka, Patrick Reed, Abraham Ancer, and Phil Mickelson (among others) that have spurned the PGA Tour.
Unless the PGA learns to work alongside LIV, they will be in big trouble soon. Money talks.
Edit: PGA to increase their purse sizes, revamp schedule, etc.
https://www.espn.com/golf/story/_/id/34125764/sources-pga-tour-looks-revamp-schedule-increase-purses-response-liv-golf-threat