Its cited:

A lot of people who hang out on the Services subforum of Bitcointalk either want to rent out their signature for a signature campaign with reliable payouts,

But I agree it should be more stressed. But might cause a flood of noobs spamming for signature campaigns, so don't sure if would be a good idea.

I would also agree:

Game and rounds giveaways, stressing that most of them are associed with gambling and have a rollover, but from time to time we see a no string attached giveaway. May be good to grab some bitcoin if you know you won't become a gambling addict.

Trading, with some indications of where to start your path in the professional trading world.