I agree, this kind of profiteering is disgusting. Remember-it is by how we treat our most vulnerable that we will be measured. If you want to obtain a betta, get it from someone who is not exploiting these animals and subjecting them to a miserable life just to make a dollar or two of profit. This is a business model based on mis-informing the customer and the suffering of the animal.
Here is another thread about these: What's so bad about baby betta at Petco?
While some may feel these are a better option than adult bettas, remember-whenever you buy a betta in a cup-you are just feeding the beast that produces them. For every one you buy, you line the pockets of the supply chain so they can put 100 more into small cups on a walmart shelf.