I've always asked for better non-monetary things in writing: title, spot on the org chart, automatic promotion soon, which parts of the product and stack I will work on, even as trivial as whether my desk will have a window. I state with constant certainty that those things are more important to me than a bigger paycheck. Most of the time I was offered far more money (in one case, 2 years pay signing bonus) in return for my agreeing to accept an offer with none of those things in writing.