Those odds are per credit account (not per linked membership).
As separate businesses, would the linked membership curtail their individual dropcatching, if they promise not to collude with each other?
As a four horse race the odds convert to,
%
67_______1.49_____ 2/1 on
27_______3.7______11/4
4________25_______24/1
3________33_______32/1
In reality I would guess that a couple of big Registrars outgun all the individual catchers combined.