The problem with hybrids is that once they are produced and sold, there is no telling where they will end up. Many people are against hybrids, and do not want them in their collection. If a bunch of people start producing and selling them, the hybrids could eventually make it into keeper's collections that are against them.

Say people start breeding and selling them. Eventually the offspring will breed and be the offspring sold. The offspring of hybrids would not be microchipped, so it would only be helpful for F1 generation animals. Also, if the hybrids are bred to pure blood animals, it may be hard to tell the offspring apart from the pure blood animals.