According to Steam Charts for VRChat, last Friday peaked at 35,218 players on Steam. This Friday, the peak was only 29,586. A decrease of 5,632 players compared to last weekend's peak.
A drop in the bucket compared to their overall playerbase sure, especially since these numbers don't account for Quest players.

But at the same time, nearly six thousand players protesting by not logging in or going to another game is a pretty surprisingly large number.