I offered a bounty on this question: Can I enable AHCI mode of the SATA controller when booting to Windows on a MacBook with Nvidia chipset? and didn’t get any answers. Now I think the amount should be refunded so if I get a useful answer, I can award those +50 to it.
Bounties are not refundable by design; you get the full value of the promotion period for every bounty, whether there are answers or not.
If bounties were refundable, they could trivially be gamed, or used again and again on essentially unanswerable questions, etc.