First of all I don't fly a T9 so it doesn't effect me overall, but I had to say making the T9 Cow skin a one off unique skin is a colossally bad idea.
I would have happily paid £5-10 for that single skin with the money going to charity - even if there was little chance of me using it. And I genuinely believe that more money would have been raised this way instead of a blind auction.
However - It has been one of the most requested skins in the store, and for Frontier to turn around and do this feels like a cruel joke being played on the community.
I think it shows bad faith on the part of FDev in listening to their player base, and sounds like it's been a marketing decision taken without that consideration.
Instead a more unique paintjob for SpecialEffect itself, or maybe offering a custom paintjob as a blind auction prize may have been more appropriate.
I may find myself making a personal private donation to SpecialEffect this year.
(p.s. I also think you have to deal with the eventual salty fallout from this).