PC has had a lot of wipes lately, some from folks who have not ever cheated online, but rather those who even only had SP mods in place and for a short amount of time. I don't play on PC, but I have yet to hear of a console player being wiped in these recent waves. I would imagine if it were related to bonus money or something legitimately earned through an event like the double pay I/E, it would have been applied to all platforms that had such bonuses. Logic leads me to believe there is at least something in the anti-cheat mechanism that is causing these wipes, valid or not, as it appears to be exclusive to PC. One of the differences between the consoles and PC is that the consoles inherently prevent many of the parameters that the anti-cheat mechanism can detect. This leads me to conclude that the wipe is somehow in relation to these uhhhh.....options...that exist on PC and not on console. That doesn't mean the wipe wasn't in error, and it could be a major programming or other software error.
I cannot comment on how many wiped players were 100% legit, although there does seem to be some correlation between "I only did this SP mod this once back in 1957 and now they're taking everything!" Correlation, however, does not identify any causation. The fact that some players have had funds removed that they purchased in shark cards does contribute some question to the reports, as in past wipes R* left shark card funds in place. Even the Feb 2014 wipe that sent many players back to $47,500; those who purchased shark cards kept those funds and some were reset to 8,047,500 for example. Either R* is wiping purchased funds, which has been proven legally actionable and why they didn't in previous wipes, this was a network error/mistake, or some of the stories aren't entirely accurate. I do suggest folks take most of what is on that forum with a grain of salt, because that place is a cesspool of the highest order.
In short, I don't know; but I have some ideas.