Hi Javier, thanks to your report, I found a bug. You received the cash, however, it was not documented in your finances. It seems the driver was a little bit more valuable than expected. Here is proof of the gap in your finances that shows you received the money for the sale of the driver:
The driver was purchased using the Buy Now option on 6 February, at 8:17am (GMT -4).
Here is a gap in your finances where you receive the cash from the sale of the driver but is not documented:
If you subtract the $4.2 million prize money, you had $109,423,437. This is a difference of $12.9 million, the amount your driver sold for, I believe.