I personally avoid gambling sites with KYC but there are some gambling sites I've played with for years and up until now I haven't been asked KYC, maybe because I don't spend too much in gambling and I'm a low baller but I don't mind giving my KYC as long as the site is trustworthy, really known one and have long good reputation. Afterall, I don't violate any of their terms and I'm playing on the country where it's allowed.

I'm not sure which gambling sites handle KYC well but I'm sure big gambling sites do have a department that handles it manually or automatically.

So you're building a new gambling site? I think the KYC was not just implemented because the gambling site wanted to, I think they need to implement it in compliance with their license or something like that.