Although I do think it's to our advantage as a fanbase that the waiting list fiasco (and it is one, they will get very disappointed very quickly if they think there's an endless queue of new customers) is in its current form at our club. Like at United, you can hate the Glazers, hate their awful mandatory cup ticket scheme, hate the fact that the stadium is a shit tip and nothing has been done to fix issues that existed 20 years ago...but 100% someone will nab your ticket.
If we lost 3-4k season ticket holders this summer we would not find 3-4k new takers, wouldn't happen. It's a tiny, tiny form of leverage over the club.
One that stands out to me was in the League One season. 25 March 2014, 17,014 vs Colchester. Granted it's a midweek against shite opposition who only brought 200 or so, but still. 18 April 2014 (when we'd confirmed promotion) vs Rotherham, 30,110. Oh look, 12-13 thousand people suddenly found time they didn't have a month or so ago.
A lot of our fanbase is very fickle and very floating (like most clubs), so you don't want to piss off or needlessly price out the ones who all things being equal, will be there whatever.