Mike
You are right in saying that federations hand back unused spots but the player list showed Thorsten under the BCA banner not as a WPA nominee,
But you have a good point about the Olympic money. The Dutch and the Qatari players are among those who have long benefitted financially from this source.
Not being an American, I simply ask this question out of idle curiosity. I am very bored this morning.

How can an Olympic committee give money to a 'sport' which does not have a national governing association?