If you care about the future relationship then say either "I don't really have time" or "that is not a good fit for me right now". If you don't, say "sorry, th

If you care about the future relationship then say either "I don't really have time" or "that is not a good fit for me right now". If you don't, say "sorry, that would amount to me working for essentially no pay, which I am not willing to do". Neither of those cases are lying btw. If you had infinite time, you wouldn't mind taking a crack at their idea.