That's a good point, but other companies do this without recourse. Paypal is the classic example. They will literally ban you overnight and hold your funds for months. Oh and forget knowing the reason, because revealing why you got banned would reveal too much about their filter algorithm.
The key is to diversify where you buy and how you buy it so you're not dependent on any one company.
The key is to diversify where you buy and how you buy it so you're not dependent on any one company.