Ask HN: Analyze my business model

I have a startup that is subscription based dating site. However, instead of charging users initially for the service, I charge them if the stick around too long. So, that if you are successful in finding a SO, it costs you nothing, but if you have a hard time finding that someone it'll cost you.

My business model incentivizes users to get on with it and not dawdle around. Therefore, if users believe they are above average daters and are successful at it it won't cost them a thing.