Maybe have a limit on how many can be traded for or by a team? It isn’t a problem till it becomes one. The league probably (and rightfully so) wants to have a balance between not limiting creativity in moves and impacting the resolution of said moves.
If a new GM were to come in control of a team with many such conditions, it can be quite problematic. There is already a learning curve as it is, and then having to resolve these moves as a newbie would suck.
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