Except you can't. Newbies aren't allowed on this campaign any more. See the posts above. I think it's a wise decision personally.
I just noticed it myself... Maybe it's a good idear to edit the initial post, it still says newbies are welcome, not everybody reads the full thread.
I do understand the risk of allowing new forum members, but it's a bit annoying for a newbie with good intentions that just wants to make a bit of BTC to get him started.
The op should be changed and I'm sure it will. It is unfortunate especially for people like you who seem to put some effort into their posts, but sadly many other Newbies don't. They just sign up and start spamming off topic with crappy replies, get banned, then just create a new account and start the process over again and most of the spam was coming from newbs on this campaign so the op did what was necessary. You don't have long to wait to rank up to a Jnr or Member anyway but other campaigns are available though I think they should follow suit as well.