I bet Biya made next to nothing for running 2:06 in Valencia. It was more of a investment in himself for future income to have a 2:06 PR. Valencia isn't shelling out appearance fees for Americans to run 2:08. So for Mantz and Young to do Valencia instead of New York, they're giving up $100k+. Running is their source of income. I don't think Biya would have made a significant amount to run New York, probably around $15k. Next year things will be different, and Biya will be able to go to the American WMM races and get a large appearance fee since he's now the fastest American marathon runner on paper, unless Rupp shows up.