Actually 13,750 based on comparing with Norway and Sweden origins. It doesn't seem to be replicable anywhere else except ex-CPH, which could indicate that these discounts are entered manually.

This erroneous rate means BA is nominally buying the avios off you for 5p each, but IMO it doesn't make sense to use it unless your schedule is very inflexible and there is no RFS availability for the particular flight you want - otherwise it would be cheaper to just use RFS or take a different flight with a lower fare. This error appears to only be offered for flights in a medium Y bucket where the fare component is between about 800 and 980 DKK.

I also thought about doing a TP run, but can't find any CE fares in the necessary range.

On this occasion, there was no RFS available and the original fare was around £160 (cheapest of the day I needed) so was worth it for such a small number of Avios. But yes I see your point, I managed to get RFS on the outbound for 4500 and £17.50 by comparison.

Or peasants :D

13,750 is the correct amount

http://i.imgur.com/kZRn76o.png

+1. That was the click-bait!