Skins are not play money
A typical Rust or CS2 gambling site logs you in with Steam OpenID. It never needs your password. If a page asks for the password, leave.
Your inventory must be public so their bot can see it. Steam Guard mobile authenticator should already be on. If the authenticator is younger than seven days, Steam can hold trades for up to 15 days — that delay is Valve, not the casino stalling.
The bot sends a trade offer. You accept in the Steam client. The site credits coins at its deposit price, which is usually below Steam Community Market and below third-party markets. On the way out you buy items from their inventory at a higher price. That spread is a fee you pay before the house edge.
rustgambling.site did not measure live spreads in this pass. If a profile mentions a percentage, it is from a dated third-party writeup, not our trade.