Well perhaps the fact that they never competed outside of athletics helped (Saint Kitts and Nevis is the only other such country, even Mauritania is not on that list). Plus, this is certainly the only sport they applied for so it was on top of their priority list.
Meanwhile, I'm actually happy that Macedonia didn't get it. Their girl may be the highest ranked, but their girl is actually Croatian who switched to Macedonia because she can't make our team. It would be very wrong if wild cards are given to athletes like her.