I may consider open sourcing it at some point if I get to the point where I'm absolutely sure I won't ever try to update to the new api. From my initial analysis it looks like it would be a lot of work to update it. If you are interested in purchasing it even though it may stop working one day I could work that out with you. It does work now and there hasn't been an announcement yet about discontinuing the api it uses now, but they did drop the api before the one it uses now. The difference is that the api it uses now was only slightly different than the old one so it was easy to update, but the new one is much different and will be more like a complete re-write.
I've been burned by a few apis that got changed or dropped. Bing search for example changed to an Azure service and is not free except for low usage, I did manage to update to the new one. Windows Live Messenger web version we had a chat feature built on and that went away. Windows Live Authentication is being re-branded and moved to Azure services and I think the implementation will change.
I'm also sensing that the future viability of google analytics is uncertain given the cookie laws in the EU and UK and only being able to track after getting consent for a cookie, and the do not track features in browsers may become an obstacle to that kind of tracking. I think more and more we may be headed back towards the old way we analyzed traffic by IIS logs.
I'm also contemplating the possibility of a new product that would do detailed tracking and logging in real time, something that would allow following the activity of individual users in real time so it would be possible to see the flow of what links people click and the sequences of pages they visit and that would not depend on any external services or apis.
Best,
Joe