There are no many sign cams available for members to join. It seems ppl are joining the altcoins pump now!
There are few signature campaigns that allow even newbies to join and earn some amount of bitcoins, but the payment structure is too low, you can earn good amount of bitcoins if you have higher rank accounts, then you can find multiple signatures to join.
But still the payment structure is not too good at a moment, its difficult to make a money with single account, so its better to to trade bitcoins and make some good money out of it.