I was paid from Measure Consumer Perspectives but only received the fee and not the reimbursement. I sent a message to their general payments email. I got a message within a half hour and they said it was an error on their part and I would be paid. I was surprised and impressed to see they fixed it immediately and I had the the reimbursement in my Paypal account in under 2 hours.
Working with a company that is straight-forward and efficient is great. I only wish they had more shops in my area.