From the looks of it for some reason it seems that the manager of the 777coin campaign always tends to get banned. I don't think I have ever seen multiple campaign managers from the same campaign get banned before.
It is pretty rare for even one campaign manager to get banned
It is not that uncommon.
marcotheminer got banned for 14 days because of PMs.
FortuneJack too for the same reason.
And I usually don't pay much attention in all campaigns that are open
How do you know FJ was banned? (do you have a thread/reference?) Even if so then that would only be two people who were banned out of 25 campaigns currently open and probably at least as many others that were open (but are now closed) in the last year.
That would put the ban rate at roughly 6% which would only be double of the form average of 3%