I have not seen any reported sales in my reports that were not for my photos. I am on a Mac, if that matters.
And, when I have had issues with MicroStockr Pro (a few, though none ever very serious), their tech support has been quick to respond, and fixes usually follow within a few days.
As far as "very serious," it might throw your report off for a few days, but I sure don't see any serious consequences. So what if you happen to see that someone else's image sells today? How does that harm either you or them? Nothing there that cannot be seen on the public interfaces at the agencies.
MSrPro is simply a nice, efficient way to consolidate your reports from the agencies and see them all in one place at any time of the day. It isn't actually changing what you get paid by one penny...
And FWIW, I have zero relationship to MSrPro other than as a very happy user...