Indeed gambling sites are mushrooming now, do not know the motive behind the proliferation of gambling sites, whether it's easy to cheat players and a lot of money / income or other things, it is very important to be advised to play and choose a gambling site that is responsible and fair.
It seems to me that it's like the Wild West, there are many opportunities. The crypto gambling sites, especially the new ones that come out of nowhere can make a lot of money with little investment if they do things half right, especially compared to fiat sites, let alone those that do everything right and buy a license in each country where they accept players and are required to have a license for it.
As I commented in another thread, some crypto gambling sites don't even have a license, or have a license from a tax haven, which means that they don't pay taxes in practice. They may offer a better HE (less) which translates into better short term profits for the players.
The main problem they have, with the proliferation of so many sites (competition) is to maintain a flow of players to ensure a cash flow with which to maintain the business, and if they do not get it, some try to cheat, destroying their reputation.