I think it is fine as commercial. But if you ever need to change one all you have to do is upload the image again as editorial, then disable the old image and ask for priority review to get the image back on as editorial. Be sure to give old ID# and new ID#. But its best just to contact support by emailing them and asking them first. Good Luck.
Nikon Equipment, Nikon Lenses, Professional Photo Software
I think it works as well as commercial. I don't see any particular signs or trademarks in your image and you couldn't even tell where it was taken :) So I think that's why it was accepted. You could send a message to an admin though, just to be sure :)