From mma recap

Even more upsetting is the fact that both fighters are local and sold several tickets to their friends, family, and training partners.  While exact numbers are not known, MMA Recap has estimated that somewhere between 120-150 tickets were sold between the two fighters.  In a 12,000 capacity venue, that's roughly 1% of all the fans showed up to watch that specific fight.  MMA Recap has also confirmed that several of these fans tried to get a refund as the only fight they came to see live did not happen.  These fans were told, "Card is subject to change" and were denied their refund.

The tickets the fighters were able to sell to their friends and family were all in the $100 range.  I have talked to some of these fans and they were furious about the cancellation of the fight insisting they wouldn't have spent $100 on a ticket when they could have watched it on CBS.