[ALittleLight]

I'm not a customer, so don't take what I say too seriously, but to me it seems like you are unilaterally making a purchasing decision on my behalf. That is, I agreed to pay you 50 dollars a month and you are deciding I should pay 100 (or more) - to "upgrade" my service. My intuition is that this is probably not legal, and, if I were a customer, I would not pay for a charge that I didn't explicitly agree to - if you tried to charge me I would reject it at the credit card level.

If I sign up for a service to pay X and get Y, then I expect to pay X and get Y - even if my automated tools request more than Y - they should be rejected with a failure message (e.g. "quota limit exceeded").