I was at Petsmart yesterday getting some supplies for Odysseus and I stopped as usual to look at the Bettas. They had a bunch of HUGE bettas, just marked as standard male betas (ie, VT's), easily as large as Petco's King Bettas, only these were long finned and very colorful.
Unfortunately, they were so big that they could not even fit properly in the cups -- they could not even straighten their bodies out without being vertical in the cup, much less flare properly, so they might have been other tail types, too. The fish were miserable -- even the manager agreed with me that the fish looked miserable. The manager said the cup size is corporate policy, but my comments would be passed along to upper management...
Seriously, this is the worst things I have ever seen, even where bettas and cold cups are standard. I've never seen a Petco King betta as cramped as this.
Please have a look at your local PetsMart and if you see this, chat with the manager. I called PetsMart customer service about this blantant cruelty and they are supposed to get back to me in a few days.