^^ we're doing that already.
I'm thinking something like maybe some kind of website-based html/php game and you get money for it by posts and recruitment. Like every 10 posts you make, you get $1 to spend on your e-car, and every member you recruit you get like $50 or something. Then you can buy rims and stuff for it, and show it off in your signature, or something like that. Then maybe later on be able to challenge other users to races.
Something like that.... whatcha think?