So with the current state of affairs you can make yourself a ton of money by being a really good FCS offensive lineman, or really any position for that matter. You develop and play a lot for a few years in FCS and then you go full steam into an FBS school that can throw all sorts of money at you through different revenue streams and you ride off into the sunset from the school that put a lot of time into you.
I mean I'd leave too as an FCS player with 6 figure offers on the table for my playing ability. Even if you don't get NIL money getting to the FBS only increases your chances of playing on an NFL field one day. The Green and Gold group can pass a plate at the Fargo Dome and collect, but you're really just wasting your time with the money floating around P5 football right now. If they want a player bad enough they'll get the player.