I'm pretty sure that condition won't hold up where I live. The seller is your main point of contact, and any problems should be resolved by the seller. Bitrefill operates under the laws of Sweden. I have no idea whether or not this condition is allowed under Swedish law, but I find this a very bad condition. It means Bitrefill won't take responsibility for the products they sell.
[/quote]
Assuming they are basically resellers from Amazon itself and the reason his account was frozen has nothing to do with Bitrefill's cards (e.g the user was flagged for a totally unrelated reason), why should they just give $1k (losing them) if they are not getting that money back from Amazon?

People could abuse that by buying a card from them, using in an illegal or against-the-ToS way and if they get banned by Amazon, they just get the money back. No risk for them, all risk for the reseller.