It definitely saddens me to think these pet stores and their ironically ubiquitous ignorance with pets. I've gone to chain pet stores like this and received great advice; on the flipside, I've had stores tell me that BPs NEEEEED those infrared bulbs at night and that feeder goldfish can only live up to 6 MONTHS.
Basically, it all depends on who works the store. In the case of independent pet stores, they have to personally pay for their follies in pet care. For these chains? They more than make up for it with the supplies they sell and the national title they work under. Really, I'm sure these animals are more to draw people in than to actually make profit–who doesn't love free petting zoos???
Its especially sad to know that hobbyists on all sorts of sites share their horror stories and outrage about these stores and yet, business is booming!
Personally, I think the sale of many animals should be left to independent stores and sellers; they are much more likely to suffer from bad business practices, having nothing to fall back on but their own name.
Also, I am pretty sure they are required to give vet-care to their animals. Years ago I worked at Petsmart, and they had a quarantine room with vet-examined animals. Considering Petco and Petsmart are very large chains, they've gotten a lot of hell from activists and probably have their own "requirements". For example, last I checked at Petsmart, you can bring back the corpse of a fish you bought within two weeks, and get a FULL refund, no questions asked. That's more generous than any independent aquarium store I've seen (though I've only seen a handful), considering that ignorant buyers can easily kill a fish within hours of getting it home...
Like I said; leave the live animals to those who have something to lose. Because, clearly, a dead 30$ gecko is no skin off of a large corporation's back...
––Summan Mirza