I did a few of those 5s and got this in my email box the next day right in the middle of a batch:
Thank you for your dedication to our projects, we appreciate your contribution.
Lately we are seeing the answer accuracy scores varying between 70% to 90%.We would like to encourage you to maintain a high accuracy score percentage on your answers. Above 85% is our goal. So please keep working mindfully on the tasks.
Please understand that even if you have the qualifications to work on these tasks, we reserve all rights to remove worker(s) from our task depending on the accuracy of the answers they are submitting and we are not obligated to send any warnings beforehand.
Happy working and thank you once again for your dedicated support.
Thanks,
OCMP
I'd done only one or two of the qual hits before figuring out what they were and then I stopped doing them. I can still work on batches but it scared me enough to pretty much skip the one yesterday. I do think this is related to those qual hits since it's too much of a coincidence that I'd get an email from them the very next day. I've never gotten an email from them before. Them mentioning the 70-90 makes me think it's qual related.