It will be interesting to see where this ends up in 5-10 years. But no doubt about it, if you're a guy that is a starter/stud at one school, there is a very good chance the transfer portal will show you what your market value is at another school with NIL. It also doesn't mean you must transfer.
On a side note, we talked about Thiero in particular today at work. Unless he truly wants to transfer because he isn't happy, worried about playing time etc. Him entering the transfer portal will undoubtedly give him a chance to see what his NIL value is at UK. I'm sure he will get $$$$ numbers on what the folks in Lexington are willing to give him to stick around at Kentucky. I'd LOVE to have him back at UK, his physical play in the SEC is very valuable and I like the way he plays.