Could part of the reason be that online dating pairs people who are more suitable for each other? There are less people just settling, to start a family. Some of those who, in the past, found someone who had just settled for them. May find it more difficult to find someone, willing to do that.
I have been looking for something similar to this that would allow me to also share the files with other people using a group permission structure per file. Has anyone seen something like that?
One challenge would be maintaining the native mobile platforms. Because of local storage limits on HTML5, I think you need to use more then the stock browsers on get it done.
It would be nice, if there was a platform like Kexi that allowed you to make not just desktop apps, but mobile apps that allowed large (>1GB) local storage of data on a phone or tablet.
I never presented this as scientific fact, nor based on the algorithms. I agree with akavi comment on your post. That has been my experience.
KMCB