Hmm that is a bit rude. I went into quilting thinking it would be a lot cheaper than it is, but I think it's worth all the money and wouldn't want to make a quilt for anyone who didn't understand the care and energy we put in.
However, I personally sometimes don't like to thank people or tell them I'm not interested especially in big businesses, because I think it will be wasting their time to open a useless email when they might be getting hundreds a day and it is a pain to go through each one.