Number of xrb's you receive from payout is distributed equally based on number of claims per ranking which should be 17k xrb in total
If rank 1 has for example 5000 claims and rank 100 has 500 this means rank 1 will get 10x more then rank 100
(rank 1 in top 200 receives more then rank 2 , rank 2 receives more then rank 3 and so on) there is no fixed amount for payout it all depends on number of claims comparing to rank 1

Hope this helps