First experience with PlusGrade today. Placed a bid on Saturday for my wife's itinerary and just got a confirmation email that she was upgraded from Plus to Business. We bid 255EUR, 10EUR above the minimum and the equivalent of what we would have paid OT. It was labeled a "low chance" bid by PG though it still went through.

I hope the bid range is not manipulated and that people continue to place low bids to slide the scale down. The upper bid limit was well beyond the fare difference when booking.