Especially the signature campaign. There are so many people who joined the campaign, yes as far i know this is the easiest job. But, for me from a different perspective as a potential investor, I would ran to Google and find a freshly picked top and recommended ICO's.
Finding ICOs in Google would just give you sometimes a lot of ICOs with just paid ratings and reviews. I am not sure where you find yours but from my top results, one would be from those in ICOBench where I don't trust a lot of ratings there actually.
Signature camps are the easiest and sometimes the most profitable among other parts of the bounty because it is focused here in the forum, unlike social media where majority of your friends don't have any idea what content you're sharing, makes less likely for investors to join the said program and invest.