Hello!
This task is challenging, but I will try to do it.
This is my proposal:
1. I've setup my website called Pay-Per-Completed-Task.
I will assign task that my members could do, that is for signups. They will fill your form, and they will get rewarded.
However, my website is not established yet. I might took around 1-2 more weeks to establish and gain members. It's a long term business.
Give me your site address, and I will let my early members later to signup for you. Just let me have the chance to prove it.
Thanks.