Given the article explicitly covers the topic of an employee exploiting prior knowledge of what coins were going to be listed and when - clear the investigators

Given the article explicitly covers the topic of an employee exploiting prior knowledge of what coins were going to be listed and when - clear the investigators were aware of the potential for this; if others were doing it, they must have done it in a way that was not obvious. If you have specific verifiable information, hire an attorney and use them to file a SEC whistleblower report. If your evidence leads to enforcement actions that are subject to their jurisdiction and the fines collected are over one million, you will anonymously get 10-30% of the fines they collect.