Did the high quality members leave for a campaign with a better pay rate?
I was in the 777coin campaign and only started looking for another signature campaign when the payments shifted (without explanation) to a fortnightly payment. The tier system was also a little hating, but being in such a campaign gave me prior history I could demonstrate when applying for any new campaigns I choose to apply to join.
Perhaps giving an undertaking to place participants of these two campaigns on ignore might hold the owner, lightlord to be more prompt with their obligations.