$100 is the minimum donation to be in the BC.
However, everything is also based on your priority level. Your priority level is determined by how much you give in one year, how much you've given total, season ticket purchases, etc.
I don't know the numbers, but it's entirely possible that if you only give $100, you won't be eligible for a parking pass as they may be full. It's awarded based on priority.
Also, $100 will only make you eligible for two tickets in sections B, F, & G. If you want more than that, you'll be placed in the upper decks.
Last year's ticket policy can be found
here. It should explain things.
If you have any other questions, let me know.
Also, if you want to join the BC, let me know that also, and I'll make sure you are taken care of.