I have been using prolific for a few years and have over 4000 approved submissions. This week alone I received two rejections for high dollar, longer surveys both from reputable researchers stating no data given or low effort given as reason for rejection. Prior to this I had 3 rejections in 3 years. The first was overturned with the researcher starting they made a mistake while manually approving submissions and they did intact receive my data. The second researcher is straight up dodging me which is frustrating. I feel like this trend of erroneous rejections is on the rise. If you feel you've been unfairly rejected please contest your rejection as you most likely are not in the wrong.