I started this because I wanted a single place for me to deal with both high-volume and low-volume sites/blogs and give me control in both scenarios. Regarding

I started this because I wanted a single place for me to deal with both high-volume and low-volume sites/blogs and give me control in both scenarios. Regarding the subscription model: I wanted to validate the idea and see if it could sustain itself. I didn't add a free version (until now, at least) because the whole recommendation engine part requires a little bit more computing power, hence it costs me to keep it up-and-running.