nope, you're capturing more surplus through tiered pricing. It's better for the consumer as well as the nix. For the same reasons I listed above.
With only 10 games at westpac last season I did have a worry that the 6 game pass would cannibalise the main season pass, but they keep offering it every year so I guess it doesn't. It should work even better this year.
I agree the whole club membership thing is unnecessarily confusing. So you could probably get rid of those two, or make it clearer/simpler - like how they used to call it an out of town membership.