One of the other things I have noticed is the number of accounts that are participating in a freebie signature campaign. Clearly this does not apply to all of those participating because many were on campaigns before they shutdown leaving them waiting for another opportunity to apply but many of the dubious accounts are hoping to be next in line when the same campaign manager has slots open on a paying campaign.

Whether those very many accounts (some that you alluded to) have been either hacked or traded, I think the modus operandi of the puppeteer controlling the accounts is to attempt to come across as a genuine member with the ultimate motive being to enrol another farmed account on to a campaign.