So when I go to a betting site I prefer three main things: Trustworthiness, timely and efficient deposits/cashouts, and good support.
Trustworthiness is a major thing for me because I don't want to deposit and have them run off with my money. I would want the platform to receive my money and have it ready for me to play by one or two confirmations(standard protections against double spends which I don't mind), and if there are any problems a good support should be able to help me fix them(or try to fix them) with decently fast response times(or at least a live chat but that isn't really something I worry about too much, long as it doesn't take a week or something to respond or something then I'm fine with a couple hours/a day). I don't really mind KYC but I would prefer to not send it over.
How would you know if a site is trustworthy by looking at it?
I'm sorry to join in but for me, it is how the technical support would handle their customers if there is a problem in whatsoever in your website. By then, the people will give you a review as you gather more and more customers to play in your gambling platform. Either negative or positive it still up to you to handle us/them.