I've been using this for a few months and it's been really useful. I agree that offering a free version and a "premium" version with a few extra bells and whistles would be a really good idea. It's definitely the kind of thing that I'd pay to have extra features for.
Hi, F5Bot author here. I'm working on a premium version, and a couple features are already available through Patreon. It has just been a low priority. If you have ideas for any premium features you would like to see, please feel free to drop me an email sometime (just hit reply on any alert you get).
