I tried to get an answer for this as well
http://bbs.hitechcreations.com/smf/index.php/topic,297435.0.html"Could we have a rotational block of 15 skins every 3-6 months? Or a rotational blocks of the popular planes?
<This would increase the number of skins x2 or x4.>"
But I think Fencer had a better idea. <I think> It was to offer all skins for download and let the players select which ones they want, up to the 15 limit per plane.
This seems like it would be good for htc as well. Instead of having a big production to switch skins, they could simply upload them to the game as they are submitted/approved?, the wait time after submission would go away.
Keep the defualt skin and in the drop down box show only the skins the player has downloaded, no placeholders.
I have maybe 16-20 skins total downloaded for the planes I like to fly ..that's it.