Is signature payment for free

[aioc]

I wonder why you joined a signature campaign without understanding how a signature campaign works, where campaign manager get their payment and what's the
purpose of the signature campaign, everything is written on all the signature campaigns you're joining the rules, the minimum number of posts, the platform you are promoting, and how and when you will get paid, the manager will take you off the list of participants if you do not know what and how you're going to promote the project that's paying you to promote in your signature profile.
Unusual for a full member to ask this kind of question, but the answers coming from the community will enlighten us all.