I suspect incremental numbers will be tiny. Most ggl’s that I know rarely travel with an entourage. In my case if I travel with colleagues they invariably have access in their own right. I will use this one or two times a year max and that will only be when flying with my family (4 people) and if we are on Y redemption tickets to visit mother in law. So I will take 3 guests on two occasions a year rather than only being allowed 2 guests (before today).

In short, a nice touch that I expect will have no measurable effect on lounge numbers.