Good if you are Bi and also there are a few people on the app into Poly relationships too. Love at a price: Larger text size Very large text size Online dating sites offer a seductively slick alternative to real-world pick-up joints. The cost of contacting a member is one ''stamp'' - RSVP's currency, which gives you unlimited contact with your budding heart-throb for 30 days. So for your convenience we have thrashed out what you get for your money, literally and figuratively. You can change location easily within the app.