I think it'll pay off eventually, but a few weeks is already a long time!
It's not so much the frequency but the instinctiveness of the dreamsign/RCs that is important.

And doing RCs on people... woah... lots of RCing
But when it becomes instinctive and filters into your dreams, it'll be a great dreamsign

In my case, I find that practicing a dreamsign causes lucid dreams unrelated to the dreamsign. It seems to trigger your lucidity just because you're trying... or something.. ?