It doesn't matter what sales techniques they use to try to drive up demand. Ultimately the same principle applies and the market will correct itself.
Something is only worth what people will pay for it. If people don't buy, you lower the price or go out of business.
You increase the price, demand drops. If there is nobody willing to pay your prices, you go out of business.
Who makes more money, Ferrari or Toyota? One company is has a larger profit margin, but demand is low. The other company makes less from each car sold but sells a ton of cars.
The people buying the ridiculously expensive frags don't do it because the don't know any better and are getting ripped off. Usually these people are serious hobbyists who have the cash to burn. I've never met any vulnerable newbies who would drop $1000 on a tiny chalice frag simply because they don't know any better.
In the coral business you are not only competing with other vendors. Your customers are going to eventually be selling frags of the coral you sold them for a lower price. So if you "release" a new coral and set the price, then people actually buy it at that price...You have a small window before multiple people are selling the same coral. Supply increases, and the price drops.
A frag of the red dragon acro i bought is worth a fraction of the pice I paid for my frag.