npub1v6aca0rwg2rwe76trv8s9zzcxeyee8seerpd5jm7lk3pxlaem66qzed7d9 (npub1v6a…d7d9) When I was running a consulting biz, I would respond to these with a boilerplate “Sure, my rate is $XXX/hour, and here is the standard contract I use. As you are not a current client, we both need the protection of a contract in place so there are no future questions about intellectual property.”
It was pretty effective at identifying those who were serious vs. those who just wanted to waste my time.