I have a sign on my table for craft shows. It says, "Sure, you make it yourself, But will you?". I think this falls under the same category, the seller has put some work into the item, has changed its appearance, and put a value on it. In the case of a wooden lamp with fresh spray paint and nothing else, or painted pine cones, I might express inner doubt that it's even "upcycled", but someone else is willing to pay for it.