Purse bids are for mandatory challenges to alphabet titles.

If the mandatory and the alphabet champion can not agree to a deal before the deadline, it goes to a purse bid.

Then every promoter registered with the alphabet gang can make a bid, the highest bidder gets to promote the fight.

The money is split by the rules of the alphabet gang. Usually 75% goes to the champion and 25% goes tot he challenger.

promotors of a fighter that does not win the purse bid, will get paid out of their fighters share, based on whatever their contract is together.