As much as i know, signature campaign seem fair enough to earn some bitcoin.
it depends on the forum account of the user. users must be atleast Full Member to earn decent amount of bitcoins otherwise they could only earn few satoshis from signature campaigns
I'm not sure if you're exaggerating or not, but there are campaigns out there accepting newbies and also pay them well (taking into consideration their rank). But I do agree that if the user's rank is lower than Full Member (like me), then you can earn almost nothing. The only thing good about is that it is way better than using faucets.