You have to fill simple Sign up forms. You can not use Proxy or change IPs for this purpose. All sign-ups must be real and from actual visitors. So you can not use IP Changer software.
Sign-ups should come from all over the world. Hence, country doesn't matter.
If you have friends/Team/ or people who can perform these sign-up work. Please Bid on this project.
I will pay 0.50 per sign up form.