I believe there are other threads on this, so you can search a bit and find some discussion, I think.
Monofolk get the same thing from a relationship with a poly partner as they would from a mono partner, except for the exclusivity. I don't think it advisable for anybody to search for a new relationship based on a benefits package....
When speaking of various forms of non-monogamy...it ain't poly if you're just fucking around.
While polyamory, open relationships, and swinging are all distinctly different approaches to non-monogamy, they are not mutually exlusive. Folks can, and some do, engage in more than one of them at a time--and it's all good.