My first question was "If this is a free service, how do I know it will still be around in even a few years?". This was answered by your comment that it is (or at least appears to be?) funded by Harvard.
In which case, why isn't this prominently displayed on the main page? Or why not use a Harvard library URL, which will significantly boost the trust level? Especially vs a CC TLD which are known to be problematic?
In which case, why isn't this prominently displayed on the main page? Or why not use a Harvard library URL, which will significantly boost the trust level? Especially vs a CC TLD which are known to be problematic?