My fish are tiny babies. They shouldn't really be in bigger tanks just yet anyway. They are easier to keep an eye on in the smaller tank. They are healthy and active. People can say whatever they want about tank size, but that doesn't make your fish healthier. You have yours in a 10 gallon - does that mean someone who has one in a 55 gallon has healthier fish than you? How you take care of them is what determines a fish's health. That thread is about small tanks, many of which are smaller than mine. Everyone know the boards opinion on tank size, you don't need to keep stating it over and over again. (not in a nice way, by the way)
I am not sure where you live, but here in NY, Petco doesn't give a crap about their bettas. When I picked up my 2 babies, there were 7 others on the shelf. 5 were dead in their cups. One had been dead a couple days because it was actually covered in fuzz. Next time I go into my petco, I will snap a few pictures for you.