Question for ticket/stub collectors

[icollectDCsports]

The graphics tend to be pretty cool, they weren't torn even when used, and -- at the very least -- gave the holder the right to get into every regular season game. Definitely not a substitute for a ticket for those who collect them, particularly those looking for for specific games, but very cool in their own right. And more rare. All of this makes them very desirable and, from what I've seen, they can be pretty pricey.

I would like to get more info about how various teams, and perhaps it varied by era as well, handled the game entrance issue -- whether one simply walked in and found a seat or was instead issued a ticket for a seat upon presenting the pass.