Useful, probably. Risky, definitely, especially when it involves money, which gambling does. If you are hiding or masking your IP address because you are playing from a location which is banned or blacklisted, that is immediately a violation of the site's terms and conditions, including Sportsbet.io's.
This is what people should avoid, I can not risk my money this way, I will even prefer not to gamble because the gambling site may prefer to use this to steal money from people as a way of punishment. But it is not only one gambling site that is existing, most do not support the use of VPN but few still do. Even while supporting VPN, the best is to use local internet service provider for the access.
This is not an entirely all-new technique but it works in some cases a quick correction Binance is not a gambling site but an exchange and as a centralized exchange that requires KYC verification how are you able to pass through the KYC process when your country is banned from accessing the site, am interested to know about that.
That is true, binance would have disabled people from the country to be able to login or register even if they mask their IP address, but some people can have some ways to have fake verification and fake everything to make use of binance. This is risky too and I will not advice anyone to do that. If other reputable exchanges are supported, binance is not the only good exchange.