It might be because the women's pro event, SUBJECT TO CHECK, READERS OF THE THREAD, was a WPBA-sanctioned event.
This is what she wrote on Facebook.
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Well then, the billiard sport confusion continues LOL She is definitely to strong to be in the Amateur open (although the reason for just playing with pro men is idiotic, anyone can play in those if you pays yours moneys), but the men being allowed to have Russian players and the women not is ludicrous.