What's more interesting than simply kids flipping, is a new development brought on by the advent of NIL.
In this new era, it can pay off for your school to continue pursuing a kid after he's committed somewhere else, and offer increased amounts of NIL money. Even if you don't get the kid, you're very likely driving up the price and forcing the "committed" school to use up more of its resources than they otherwise would have, if you'd just stopped pursuing that recruit. We're already seeing this scenario play out quite a bit, this recruiting cycle.
It's a brave new world out there.