Paying for signups should work.
You don't want to do this... people will sign up, do the bare minimum,
and then quit after getting paid.
Make a website, advertise with:
Paid to click, banners, also can make a faucet...
See my signature...
That works too..lol
Use your signature....
Just to let you know I know what I am talking about...
I have 2600+ BTCClicks referrals.. 2000+ Coinads referrals... etc...