That's why I mentioned Baron. I can't think of anyone who came back and played except him. It's pure speculation whether the others "shopped around and got a better deal elsewhere, wanted to leave, or were told they should leave."
It's just my way of thinking but it's kind of like threatening a divorce. It's one thing to be upset, want things to change, etc but once you file for divorce, my attitude would change. Couldn't we work this out more privately?
I think of the portal as "I'm done talking with you and I'm moving on." I'm just not sure a significant percentage of significant players have "jumped in and come back" at any school to make that a "strategy."
I suspect that Baron was wanted and offered more to come back and I think I recall a few other "higher profile" guys at other schools who went in and then came back, but there's not many.
If you hit the portal, you'd better be dang sure you have value out there (and Mincey likely does) if you're trying to squeeze your current team or you may find yourself on the porch with nowhere to go and the door locked.