The rules say the following, regarding the Referee:
If other teams have equal strength, they can bribe the Referee to get the better trophy. The bid him Basko simultaneously, highest bid wins. If the highest bids are equal, then the highest bidding team with the tallest player wins. Half of the winning bid (rounded up) goes to the team with the Referee. Add the other half the the Basko-stock. If 3 (or 4) other teams tie, then the second (or also third) highest bid wins the next-most valuable trophy.
Clearly the winning bidder pays his money, but what about the losing bidder(s)? Do they take their money back or do they pay their bid?