Maybe think of it relative to your current lead flow. A 30% uptick would be good no?
Although, to your point in the article, Spreedly integration is probably a higher-touch process for most people. I would have been scratching my head as to what I would expect happen if I turned Spreedly on in my Heroku dashboard.
Btw, love that you're being candid with numbers. These kinds of things are interesting to us here. I'd personally like to hear more about the pricing changes you made last year, and what impact it had on your business.