Thomes was considered a session drummer so hasn't he technically already been paid? Couldn't Omar release thomas stuff without paying him since he was already paid?
I'm probably wrong but that's how I look at it.
We obviously don't know the nature of their contract if there are royalties to collect or what. After Adrian's posts I wouldn't be shocked to learn that Omar doesn't always pay out, but we'll never really know unless someone else decides to go all out and sink his reputation.