It's not all atomizers. It's just specific products. That I know of so far, anything authentic from Aspire and any version of the Erlkonigen.It's because PayPal won't allow PayPal to be used for atomizers specifically.. so the only other option as fast tech doesn't apparently want to deal with a million credit card companies, is to start dealing in bitcoins.
ETA: All you have to do is order something for the right amount of money, then cancel it immediately choosing gift certificate for your refund. That way you can spend the gift certificate for whatever FT can't use PayPal for. That's the way I do it.