RSVP calculates your Reply Rate to Kisses from other members. You should aim high with your Reply Rate, not just as a simple courtesy to other members, but also because it helps you succeed on RSVP. Having a high reply rate improves your profile's position in search results.
How it can help you?
The more you reply, the greater your chance of making RSVP's Top 100 list.
Where to find it?
Check out your Kisses tab.
How it's calculated?
Your reply rate is the percentage of people that contacted you in the last 60 days that you have replied to.