All the transfer portal did was create a farm system for the "BIG BOYS" ...If Ohio St, Bama, LSU, Clemson, Georgia...etc. Ever find themselves "thin" or "weak" at a given position heading into a season. They will use that offseason, through back-channels, to get word to a quality/good player at a smaller school (ie Indiana, Syracuse, Boston College, TCU...etc) and entice them to transfer to their school to make more $$$$ and to be on a larger platform to get noticed.
This is a total major league/minor league set up and now with money involved the transfer portal is just a way for the big boy football schools to throw around their clout, money, and numerous advantages they have over the smaller football schools to "cherry-pick" the good players the smaller schools develop.
The gap between the "haves" and the "have-mores" will just get greater because of the transfer portal.