For all sorts of products like various electronic devices and kitchen gadgets, they are just iterating way faster on product feedback.
I think of some product I'd like to have, and discover somebody in China invented it 9 months ago and I can buy it through Amazon for $19. I buy it and use it for six months, then realize I really wish it had some other feature. I check Amazon, and now it's in its third generation with the feature I want plus two others.
I don't get why people are complaining. It's genuinely amazing, and a kind of entrepreneurial spirit I can only respect. Why people get hung up on the random-letter brand names is beyond me, who cares?