I don't know every rule of etiquette, but I was really irritated a while ago when I received a convo from a seller who I featured in a treasury. Her item was the last in the bottom row. She said:
"Thank you for the feature. However, I feel that my item fit your theme very well, and I was disappointed that it was not in the top three rows. I think that it had more right to be there than some of the items that were given those spots."
WHAT? How rude! I said nothing in response, and replaced her item with someone else's. I have never received a negative comment from someone who I had featured in a treasury. I mean, it is a good thing to be in a treasury, isn't it? Someone has to get the last spot, and the last spot really isn't that bad...
Have you gotten anything like this? Do you think I have a right to be SUPER annoyed?