Majority of the campaign here do not have affiliate code
Affiliate code isn't necessary to be considered affiliated. The fact that I'm getting paid from them to advertise them does add an affiliation.
What I mean is being specific if you have an affiliate code and working as an affiliate you are directly recruiting and you are directly working on the site and actively recruiting because you are getting paid based on the action of your referrals you have your own affiliate account your own affiliate manager and you are putting up a budget to promote a project.
Whereas in a signature campaign, you are doing specific you are just posting in a forum so your signature space will show up the project you are promoting, other than that you are not doing anything more, Google is showing ads but they aren't affiliate on those ads, Facebook is showing ads and accepting payment but they are not affiliated to those products and services.
It's a bit different for a promoter working on a desk and getting direct instructions from the managers or owners and a guy just getting paid or hired to distribute a flyer.