I’d guess that the active accounts – is incorrectly labelled.
I’ve just ran the same report and got results similars to yours – in the the # of “Active Accounts” is very similar to the # “Visits” with just a small variance of change.
We had 23,000+ visits over six properties, and in all cases the # Active Accounts was very close to the visit total.
There is no way he have or had 23,000 registrations – I am wondering whether people that guest play the free games somehow get counted?