On Friday night I was disqualified after 40% complete on a Business and Employment survey that was worth $17. I opened a ticket with the support dept which replied on Sunday morning, said they would manually add back $8 to my account.
I think we need to get our deserved "earnings" when the system having disqualified you ridiculously. They KNOW there are system glitches, or the surveyors designed some rouge surveys to get enough information but not paying you the efforts. If you do not complain, you never get the deserved points. So far eRewards have manually posted any of the ridiculous disqualifications reported. That is why I think they KNOW what is going on.