It would probably be less work, if done right, if these pet stores would just buy a 20-50 gallon tank and divide it. They might even have less betta fish die this way. Half the bettas at the walmart near my house are half dead or already dead. The little cups they're stuck in until someone buys them are probably ridiculously high in ammonia.
In my area, there is one walmart that takes good care of their fish. Two take TERRIBLE care of their fish. At one of them, the water was so dirty that there was fungus growing around the uneaten food. I did get Sequin from Walmart, and I love him, but I no longer want to support their animal abuse.
After reading a few of these posts, I was thinking "Maybe, the next time I have room for another betta, I'll rescue one from Wal-Mart." But Lionmom has the right idea. To get them to stop selling them, stop purchasing them! If we don't support them and they're not making money off of them, they're going to stop selling them. That's an excellent piece of advice.
Sweeda88, your betta is very pretty! And wow, he's a big boy! Hehe. Mine are all between 2-2.5" from their lil noses to the start of thier tail. My HM has a huge tail, so I'm not sure how long total. Goomba3, I agree, but think about how many bettas are going to die before that happens? Honestly, you might as well save a few, because they have been carrying bettas for ages, and since you can't complain about every walmart because some actually do try to care for the bettas... You sure can yell at the manager though!!! Don't hold back on that.
@Bettaluver: That's true. I usually don't go near the pet section when I go to Wal-Mart, simply because I don't want to see the horrors that are the betta cups. I generally stay away from the bettas in all stores (Wal-Mart, Petco, Petsmart, LPS) because I always want to leave with one. >.>