Definitely full of curious people, but 90% of them seem to be other marketers.
Try warm up your leads a bit, and target more specifically.
That's just common sense advice, I cant say CB on Twitter works too well for me, I havnt made my millions on clickbank using twitter (yet).
Most products get flogged repeatedly on twitter, so you might be the 10th person to advertise the same product to the same person in the same day.
I know i get spammed by the same crap over and over, people claiming they can get 10,000 followers, yet they only have 500 followers, spaming me, and I'll actually already have more than 10,000, it's all a bit moronic.