Theoretically I guess those on it get paid to be on it I'm assuming and that could be fairly decent money, I assume. In addition if you play it well enough there could be further money earning opportunities to be had. Either or both could end up as TV presenters, celebrity appearances, celebrity endorsements, TV advertising, Authors, etc, etc. A lot of that though will likely be luck of the draw even once on the show.
My guess is that to get maximum opportunity you have to both stand out and cone across in a particular way. Memorable, stand out a lot, a noticeable personality, talked about happenings, etc. So probably best to choose a FSW who naturally bounces off you in a amusing sort of way, nit necessarily having arguments all the time but interesting reactions. My guess that someone who is a bit different to you probably a but younger girl may do it.
Relationship wise idk whether a good commercial relationship and a good personal relationship can both be had is really shooting for it I think.
George & Anfisa were an interesting couple on there but it didn't end well for George, jail & weed business collapsed. I don't think Anfisa got very far going it alone last I heard. They were an entertaining couple and sone interesting points but not quite enough to make them go in to better things I think, perhaps if they had stayed together it might have gone better, too much antagonism I think there. Perhaps you could do better CG?
Me I'm from the UK so unfortunately I don't qualify, if I did I wouldn't mind giving it a shot. If you become a TV personality, wealthy, even just from the show itself it could pay off. Ten, Fifteen or Twenty years or so down the line odds are most will have forgotten who you are if it was just the show you did.