Creative massive indirect signups to email service

My email/webmail company Runbox wants more people to test the service for free. We want people to sign up for a free 30 day trial from our site or from any other site or service than can integrate a Runbox sign up in their service and "feed" sign ups to Runbox.com. We have opened up for anyone, or any kind of external provider to "feed" new sign ups using a http get string: The http get string looks like this: [login to view URL];password1=123test;password2=123test;first_name=wellish;last_name=wellsen;country=NOR;timezone=America/New_York;email_alternative=emailaddress@[login to view URL];agree=y;signup=1 Note that the IP number sending the http get sign up data needs to be allowed on the receiving server. Note that 1234 is the affiliate ID where affiliates (you?) make USD 50 for every new customer you bring to Runbox. It is therefore easy to add a Runbox signup to any other signup (or membership, or something else creative) to another service by just posting the data to Runbox. Regular sing up page is here: [login to view URL] The sing up code has been integrated into the sing up procedure of vBulletin forums as a plug in / mod here: [login to view URL] So when any users signs up for a vBulletin forum, they automatically also get a trial Runbox account. We are looking for more creative ways like this, to get sign ups. Runbox is open to any business model. Ideas: Integrate Runbox sing up in your forum, blog service, game, website. Integrate Runbox sing up in your software. Some viral component. Write stand alone software or applications that just sign up new users to Runbox.com. Find other creative integrations.