To test the idea in a small example we created https://hd.dating - it's an example of interaction a lot of peoples: developers, astrologists, copyrighters and translators. Just check how it works 
How many participants do you have? How many couples have found each other?
For first month 15k peoples joined to project. We don't accumulate stat about their relations after talks
We testing business case - interest to method, get usage metrics and collect feedback
Main metrics (conversions from cold traffic, service usage) was better than in other our projects.
but we observed an interesting effect:
Users read information about themselves, than added their relatives, friends, children, collegues. Dating function was not the main function of project. Taking information was main function, and it was used for different purposes.
It was usage test. We received results and feedback. Feedback was very interesting and positive
It may sound like a stupid experiment, I think that we will have a good data base.