I would be very happy if stores would just change the advice they give people, that's what bothers me the most. I understand the need for the small cups in the store, its really the only logical way to house them, but when there's 10+ cups filled with dead rotting fish and old food, there's just no excuse for that.
Actually there really isn't a call to have them sitting in cups at all! For transportation you have bags for that! They could take the area where the bettas are and make a betta wall! 1gallon containers (Aquariums) all with overflow and a sump and a pump for filtration and to flow the water back to the containers they are in. Not only with the normal neglect for them on store shelves this would make the life of them longer even with neglect! They would even save on the little cups because they cost more than the betta does for the most part and more than a plastic bag they bag fish up in.
As far as looking at the breeding side of it they do the same thing males go in cups and females into a soroity tank, its the way I did it about 3 years back or so. I am looking at breeding mine but really don't like the water change and the upkeep needed for it only because changing the water 2-3 times a day is a pain,... it really is weather you believe in housing that way or not! The best thing I have come across for bettas so far is the betta wall, not only can I give them a 1 gallon tank ea betta gets a 1 gallon tank to grow out in but I don't have to worry about all those water changes everyday! As a breeder of these creatures I find this is the best system I have ever seen for them especially keeping/raising them in bulk. Not only that I bet my survival rate will be much higher and my profits will pay for the wall in 1 breed okay maybe 2 breeds lol. But looking at a store that has who knows how much invested into there other tanks not talking walmart here talking lfs that use an actual filtration system, why can't they do the same for bettas its not hard and the technoligy is starting to pick up now especially for a betta wall! Its cheap, provides individual homes for ea fish, saves money on cups!, less water changes, ea betta can be monitored easily, feedings takes less time etc just so many pros to it, the cons are ick spreads quick lol throughout an entire system like that but its still cheap depending on how you build and maintain it, it needs to cycle so it takes time, investment up front, costs more in the beggining than housing in cups etc
I actually got to talk with a few LFS in my area about them and really to be honest they don't care, basically one person says owe we buy them for 1 dollar ea local or in bulk with our other orders and they are cheap so no big deal! This was an actual reply I got, and even they knew the proper way to take care of them it just all comes down to money with them and thats usually all they look at weather it be for the good or the bad! I even went as far as saying to the guy I had Wild betta's I bred and would sell to the store, he said ya and offered a price I said its this much per fish (Was resonable) he said I wan't bulk this many for this price I have to calculate the losses and there will be losses, I said there will be no losses unless you don't understand on how to take care of them! ....... I never dealt with that place for selling my stalk, I told the guy he was crazy to be putting Halfmoons, doubletails, SD, etc in cups. In the end the person just didn't want to invest the person wanted the quick dollar from them! Really I only see it as they look at the money part of it only and its about the profit they can make from it or the quick dollar because they die in 2 years anyways lol we know thats not true. Its the way the world turns we just have to learn to live with what happens. But really like this topic stated I love reading about all the people who complain all the time but they are not out there doing anything about it! The person is right though it is true alot vent on the internet about it, I have just learned oh well and learn to live with it! The stores I deal with know they will have to have a system of some sort for them if I sell to them, usually they would just send people to me was much easier than dealing with the middle man and probably will remain that way anyways.
I guess the end of the story is, basically it all boils down to Money in the end, especially for the shop owners and stores like wallmart and petco, petsmart.