Guys, since you're talking about signing campaigns, I would like to know what conditions are most acceptable for campaign participants? We would like to launch a campaign, but we are still thinking about which manager to choose and what campaign conditions will be most suitable for participants.
I don't think you should base only on the opinion of the campaign participants. There are only a few rules for them. Number of posts they can/should write, payment rate and limitation in which boards it is desirable to be present or not. The Signature campaign serves the owner in building and promoting the business, and the brand and adapts to it.
It is best to contact one of the managers (why not more of them) and ask for specific suggestions based on their experiences. I noticed that Royse777 and icopress do some kind of analytics and monitor the final effect of the campaigns, so I believe they already have some conclusions about it.