Luckily our wal-marts, all three, stopped selling them about two years ago. I remember they use to have all their tanks freezing cold, not just the goldfish, tropicals too. they felt no more than 60 degrees Farenheit. It was so sad.
Petsmart is going downhill in my area, the last few times I've gone the bettas are floating in filth, found two dead, many listless. and one time they had sooo many that they were stacked 3 high. Aside from the threat of falling over if someone bumped the shelf, their only air hole was covered and their dirtyness was less noticable if they were buried...