What is cryptotalk.org and why is it on everyone's profile?
CT is the forum of yobit, one of the abominations of exchanges out in this market. Good for dumping your shitcoins if you are a bounty spammer. They were running a campaign which ended this last week and now you will see a gradual decrease in their signatures because the participants will move to other signatures. Not everyone was in it though, but many users were taking part in it.
Is it like bitcointalk and does it also have campaigns?
Fellow bitcointalk user, you need to understand that the biggest traffic share for the bitcoin users is this forum and so other smaller and newly created forums want to predate the traffic from this forum. Not the opposite way. The CT forum is a breeding ground for spamming and spammers get paid to spam. So if you are into spamming to get paid, go there.