Are they completely random and infinite, or are they taken from a limited pool of existing hashes, such as from the blockchain?

So, my host and everyone at support tell me you don't have or support API, which if we take literally, I would say is false, since tens of HTTP requests are being made to an API link of yours "bc.game/api". Then everyone falls silent when I ask how the bet process is handled, if not by API. That is because there are API requests for everything in your website, but not for bets. Even when you do the most useless things, like open a menu, there are API requests. When you bet, none. And I was wondering: how are bets handled then? I would expect that on bet, API requests would be sent in the pattern of {"game":"Plinko", "amount": 1, etc.} and would then be processed and validated by your backend, like most other reputable casinos do. I think this is important to be made clear and public.