What's the "integrity" problem? They went to a tryout and got offers. I assume the players didn't sign a binding multi-year agreement?

This is the way the free market works - Sparks let this happen willingly, unwillingly, or unknowingly.

We live in a world where Texas Tech is recruiting players during the existing season. There are no more "gentlemen's rules", if there ever were. Players (and parents) have more choices at every level.