Shane,
You might want to consider offering two versions. A free version that allows for the most basic functionality (i.e. posting events only), and a premium version that comes along with all of the doodads (including support which can be activated during product registration). If you don’t get the premium version, you’re on your own.
I’m relatively new to WordPress. I love it, but part of my love for it is that it hasn’t cost me anything to tinker around and get started. Had your plugin been a premium one, I likely wouldn’t have tried it and would have settled for another free, albeit sub-par version. Perhaps just a trial version is a possibility as well…
Best,
Benjamin
