I haven't looked into it at all I was kind of going off the above quote someone else posted:
"Once the next major patch launches, we will no longer wipe real money or gold purchases. All purchases from that point on are considered final."
"Future updates may still require adjustments or wipes for player progression, but there are no further plans to do so, and this will be avoided whenever possible."
Makes it sound like they could wipe progression (which actually makes sense so people in beta can't do hero league automatically) but not purchases.