Discovered staking and scamming at the duel arena. Invented a new scam and made bils. Made a sizeable chunk over a couple years (enough to pay all my bills in college and a LOT of beer money). Got into botting with some friends, made a little money doing that too.
My experience with RS led me to an interest in economics, and I'm now an accounting PhD student about to graduate. My bro got into coding bots, and is now an SWE doing high level work.
I love the game to pieces, and it isn't because I made money playing.