that's true as I find it the best way to earn bitcoin on regular basis and there is no risk in it as it is involved in gambling and trading.
It is obviously the best and safest way to earn some bitcoins on daily basis, but the earnings coming from it are not as much as someone can earn in trading, i would surely not recommend gambling as it is only risk and there is no way someone can be winning by any ability he has as he can do in trading.
Trading and signature campaign are the best way to earn some bitcoins on daily basis and if you think that it isn't enough for your standards.
Well you must sell your services here also, or if not just sell out your account, better for high rank accounts.
I do both, trading and signature campaign, for me it was more than enough. and trading can make more profit, but it depends on the strategy and initial capital. I have a target that every day at least be able to get 0.01 of trade.