As mentioned, ref links aren't currently allowed but changing your design is perfectly fine.
If anyone sees this please read this and share your opinion:
I'm toying around with the idea of having a set group of people who I've personally deemed are high quality posters to continue to get paid per post count and branching off the campaign to allow anyone to join on and off instantly and use a PD3 referral link which will automatically credit their account (I'd likely boost the referral rate to something like 20%+ for those not being paid per post)
I'm confident doing this would greatly cut down on forum spam, while the very high quality posters who I select would have the option to continue the campaign as it exists privately or swap to a referral based payment.
This isn't at all decided, so feel free to weigh in.
The current saturation of the Primedice campaign looks to me to be very successful. Whether that be through people spamming or no,t every thread you visit there is a significant amount of Primedice signatures. So you really have to ask yourself, will a ne system be more effective and produce a higher financial gain for you, or will it cause forum users to leave your campaign to find a more lucrative one? I think you will find the answer is they will leave. One other thing to keep in mind is that I personally have only been registered since April 2013. I spent a year coming to this forum reading posts, and seeking information without ever registering. I am not going to use a referral code in this circumstance, however if every time I seek information or visit the site and I continue to see this marketing effort I am likely to clink a link, investigate and then maybe at a later date go back and actually play. The likelihood of me using a referral code is slim, and if there was a benefit I would probably go seek out a new one not necessarily the one I saw from the original poster. With bitcoins growth and the growth of the forum I think it will be more lucrative for you as well as for the forum members to participate in the campaign in its current state.