I am surprised that the owner of the websites/companies that the sig campaigns were advertising for have not made any kind of announcement saying they will cover payouts as they are responsible for their participants getting paid at the end of the day.
I advised mexxer contacting the owner of e-coin to ensure exactly this and I commented in yahoos "I'm desperate, what to do" thread with a similar advise (which seems to have been burried under the other replies).
At the end of the day, this shouldn't been dealt with on costs of the participants.
Well unless the campaign manager specifically agreed to cover payments, or is otherwise holding funds to cover payments to participants, then there is no reason for campaign managers to pay participants out of their own pockets. They responsibility extends to managing the campaign and that is it.