This was actually very useful! At least on the single paper I had saved for some later time when I would have time to drill down into the unfamiliar syntax (i.e

This was actually very useful! At least on the single paper I had saved for some later time when I would have time to drill down into the unfamiliar syntax (i.e. probably never!). I signed up, but can't help wondering how long you plan to keep this a free service, without any obvious monetization of some kind?