Thanks. Added to the list (in the 2nd post).
I noticed one thing about most of this free signature campaigns, they seem not to last long from the way they might have started, you can imagine from the list and all other recommended free campaigns other members added inline with this one, they are no more active as they used to be before, which I know that most of them don't have a specific campaign duration which might have relapse, but I also see the lack of bump to some, while others may receive drop on participants interest because they are just free service, but they are actually passing some messages across.
I think that's understandable and somewhat expected. Unpaid campaigns will never have anywhere near as much interest as the paying ones.
I don't see any harm if keeping them listed here, unless some projects are clearly dead or officially discontinued, in which case, please do let me know and I'll remove them.