One of the last times I was there, I bought a FW puffer from them
that needed small snails to keep it's teeth trimmed. Generally, these "pond" snails usually come in on live plants & are considered pests to any shop. Any store I've ever been to has given as many as I can pick out for free. I found a tank that was infested w/them & asked if I could have them. The fellow working there said he'd have to ask the manager. After waiting 10 minutes, he was helping other folks & finally told told me they'd be no charge but said he was too busy to pick out the snails, I'd have to wait for her. I asked him to ask her if I could get them out myself (there were no fish in there). She finally came over & told me they'd be $.25 each (this is after waiting around for 1/2 hour, for an answer). Keep in mind, these snails are as large as a sesame seed. Needless to say, I walked out w/o any snails.
I have seen them selling juvie dogface puffers as BW puffers, along w/other SW puffers & BW puffers as FW (larger customer base that way).
It's all about the almighty $$$ to them.