15 post a week is not that hard to do, that's only 2 posts a day with only one day where you are going to post three if you cannot follow an easy and simple rule then better not participate in a signature campaign, 15 post to me is fair if they ask 30 to 40 then we can ask for percentage of the stakes.
15 post is the lowest max post for any sig campaigns including the ones that pays on bitcoin and etherium . other campaigns are more harder than this because their target qouta per week is 25 to 35 post . while other campaigns have a max 60 post per week , higher than this are consider inapropriate anymore as they can cause a massive spam to the forum . right now im a campaign that pays good and im going to say that im satisfied with it .