First off, this signature campaign isn't the entire point of the forum/being on the forum. Even though you seem to think so at the moment (dunno why).
Secondly, it's not even the only campaign running, there are plenty of others out there (some worse imo, some at the same level, and some might even consider others better).

Now to your question, don't "waste time" on becoming something, spend time on the forum if you enjoy it, post what you think people would like to read and the other stuff, like ranks, comes naturally, rather than being "farmed" or "gotten".
Also, don't go around like signature campaigns are everything. They're a neat thing, a priority some of you can currently enjoy, but they're neither granted nor something you should count on. This forum is more than a plain collection of signatures below each other.