Great service.

You need to put in the version / date of these ToS, otherwise it would be hard to update. I would also keep an archive of all the ToS on your servers since volunteers would like to use track changes as a new version is published rather than re-reading the ToS. It would be also interesting to see how the terms have changed through the years.

A great feature would be to categorize these services by category. Eg: for search engine: Bing, Google, DuckDuckGo. You could add a more comprehensive chart on the terms and how it compares across these services. Eg: Tracking: Google keeps ur data. DuckDuckGo does not track user data.