Hofstra is far from under the radar for Power V teams. The CAA is a middle-tier conference.
With the always expanding staffs of college basketball programs, among their duties is to breakdown every roster of every D-1 program for the after the season transfer portal. Guarantee WF and the other Power V programs have a file on every D-1 player with eligibility remaining. Wouldn't be surprised if it has advanced to the point that there is an NIL dollar value assigned to every player with eligibility remaining so they have an easy value reference guide.
Also, Dubar started out at Iowa State before transferring to Hofstra; he was offered by Marquette, K State, Auburn and Iowa State out of HS; so, there are already lots of Power V connections to him.