A lot of limited campaigns : lunamine is limited to 5 users, anonimity to 5 users, fastbluff 15 participants...
Primedice is something like 200 participants !!! Really different.
Yes, PD is the most reliable, stable and i think the oldest signature campaign.
And fortunately, they're not closing their campaign. It would be a terrible loss for us if PD closing their signature campaign.
Fortunately, considering the growth of Bitcointalk's userbase, it still seems profitable for them to keep their campaign running.
Until the time when all of the forum's users will be using it I guess
