The point is that the stated 0.5% is an upper bound, so even if none of them also bought a ticket, as you speculated (and I find it very unlikely that this is t

The point is that the stated 0.5% is an upper bound, so even if none of them also bought a ticket, as you speculated (and I find it very unlikely that this is the case), they would still only make up a 0.5% difference in the box office revenue.