I post our monthly match stages on our website (www.ourcowboys.org) a couple of weeks ahead of time. Quite honestly the biggest reason I do it to generate some excitement among our shooters ("Hey, did you see all the lines are from 'True Grit' this month?"). People seem to enjoy seeing the scenarios ahead of time, and it does generate some enthusiasm and talk. They do review them, as I occasionally have someone point out a small error or clarification that I can correct prior to the match. I only see an upside to doing this, so we will continue the practice.
For what it's worth, our scenarios are archived on our website, so anyone is free to go there and download our stages. I do this as a service to other stage writers. Feel free to borrow or steal any stages you want. I've done the same with other clubs' stages for years.