4. no need to change posting habits.
You say:
A maximum of 7 posts per day will be counted. This breaks the 4. no need to change posting habits.
Allow me to nitpick (again): this
doesn't break #4! It's totally fine if certain posts don't get paid. It may become a problem if the campaign participant changes his posting habits to meet the campaign criteria, in this case spreading the posts he would have made in one day, out over the rest of the week.