First thanks for this nice plugin. This is without a doubt one of the best (may be the best) free related post plugin yet available.
For this reason, i’m sure that a lot of individual user like me would like to test the pro plugin for their personal, non professional websites.
The only price for the updrade is 59$ (with one year update) for unlimited sites. Most of us only have one small website. Why don’t you offer a smaller cost for us? Something like 29$ (or even 39$ like the Related Posts for WordPress plugin) so we may decide to upgrade? I’m sure you will have more supporters 🙂
Or make a promotion for the new year 🙂