How to get targeted visitors for a social network?

Question

contextual advertising

How to get targeted traffic (preferably cheap) for a social network. I tried to advertise through Sociate and they wrote that it is forbidden to advertise a social network on a social network! How then to promote it? Only you need not to promote in search engines, but to get regular users.
I have an Adwords promo code for 1000 if I spend 500, but for 1500 in Adwords, as I understand it, there is nothing to do.

Answer 1

I bought myself a 3D printer to print a 3D printer)))
You also went to the social network to advertise the social network ...
Look for communities and advertise there and create a group on the social network, promote it and drive people from there.