Originally Posted by
WineCountryUA
The potential advantage could have been XN access for the non-elities, but in this case those credit cards also offer XN access
The secondary benefit is if the want to book an award but have insufficiency miles and you would rather not to front them the entire amount from your account. Pooling is useful for multiple low earners to more efficient use of their miles.
Another potential use case is when person A and person B want to book award tickets together, but each only has miles sufficient to book one ticket. By pooling, both tickets could be booked together on the same PNR.