Jobs. I've gotten hired for like 10 different gigs over the years (product promotions, exhibition openings, eye-catcher at conventions) and the pay has definitely been way better than for normal occupations that a 15 - 18-year-old with no job experience can do.
Different but maybe also useful: Official accomplishments can't look all that bad on a CV.
Travel and people. I've met so many new people at competitions. I got to go to Hungary and Poland for Euro and Worlds in the US for free and I could never have afforded it myself.
I also think cubing may have helped finger dexterity with my guitar playing.
EDIT: Oh and once I started BLD, I realised how not hard it is to memorise stuff which can come in handy with other stuff, too.