I work every saturday so it doesn't affect me; and if by chance I did have a saturday off, we have 2 shop passes I can check out or I can purchase lift tickets for $25.
Most of my friends buying the pass are also getting June passes which is only about 15 miles away from Mammoth and their student pass is only $125. So for $526 you can go every day, just have to go to June on some of those.
Not enough natural snow for it to be safe, most utah resorts also dont care enough to blow snow until they will make money.
Also, some resorts aren't on private land, so they have to wait for their lease with the forest to start.
Overall, its basically all about money, pc is really the only resort that could blow enough snow to open early, but they wouldn't profit from it and don't give a shit about locals. Also, it usually is barely even warm enough for pc to blow snow when they actually do open let alone in mid october, CO is much colder this time of year, hence they can blow snow and open.
Can't complain about lines if tickets are free. Should have stayed for today, I could count the amount of people there on both hands. I paid $30 to ride boreal's 4 inches of snow patch last weekend and you could also ski from the top which is unheard of for other resorts in october. Mammoth killed it.