What is the best way
 

What would be the best way to invite members to join a dating site. I don't really want
fake profiles, but since this site is brand new, Visitor to sign up ratio seem way less than 0.5 %.

Ideas.

I am going to teach you something right now for free that you need to remember:

when making money throw all your morals out the door

any successful company IS bending and breaking the rules everyday to get ahead. the faster you learn this the better.

What are these 'morals' you speak of?

I'll keep this in mind :)