I believe that Couchsurfing is not about saving money, it's about exchange of cultures, experience, fun, interesting stories, socializing, etc.

Traveling in Iran for 3 weeks with no alcohol! Running through the subway tunnel in Valencia as we forgot to buy tickets and couldn't get out from the subway station. Living in a few meters of distance from one of the most dangerouse Favelas in Rio de Janeiro, and knew about that only the last day of my holidays in Brazil. Tuk-tuk ride for a few kilometers in Sri Lanka with 5 people + the driver and our backpacks.