I actually quite like the option that a player can only represent 1 BB3 team per season.... it sure would make it fun on the transfer market and maybe force demand up for the monster salary players but as you and others have said, its a competition for 256 teams.... best to just draw a line in the sand date wise and register your players in advance for the season, maybe with a re-register period ahead of the neutral court rounds.
BUT, if as there were rumours before of other international competitions for Division 2, 3 and possibly more teams then we would be talking about a much larger pool of teams competing for temporary signatures... this would again make the dynamics of the transfer market almost impossible to predict.
When 2 teams are battling it out for 3 x $500k players a week then they will both get 1 each for 1.5mil as we've seen happening.
If we have multiple semi-finals, finals etc and 10 players on the market (8 of which have already represented a team in a previous round there is no way the remaining 2 will go for under 3-4mil)
Lets spice it up a bit!!