Well the quality is going to be less than Lego. That's inherent in the product itself. That's why a 200 piece set only costs 10 bucks, inc. shipping. The question is, is the quality still at least good enough to justify a $10 purchase? And the answer is overwhelmingly, yes.
I'm curious why you'd buy the same exact products from Amazon or eBay though? How would this alleviate your concerns over quality if they're made in the exact same factory?
Also if they stole you credit card, you're fully protected by both Visa and your bank. You are liable for exactly zero dollars. Getting a fraudulent charge reversed takes less than a minute. But I've ordered from AE close to 50 times at this point and I've never had this happen.