Obviously, OP launched his platform prematurely; he did not configure the sign-up page, and there is no information about what the platform is about, no FAQ, no TOS.
OP is a newbie developer and marketer; a seasoned developer will not think of launching his platform prematurely. There are stages before launching your platform, such as the alpha and beta. Alternatively, he may not be the developer, but rather the promoter.
If you thought this was a casino, you are wrong here, mate. This is a slot game API provider, and they offer API integration for casinos, like what Slotgrator and Softswiss have been doing for a long time. I assume these services are expensive because they are too famous now. If a new startup provides cheap rates and they start with a few providers, I think the new casinos would be fine to get them.
Everyone has to start at some point. I won't criticize OP because he published his website here without completing everything. At least people can still see and read what he is offering. I have seen worst site before.