Somehow I never saw this question before now. In the future if you have questions like this about content on Sefaria you can email hello[at]sefaria[dot]org or the Sefaria User forum - I obviously can't guarantee anything but answers there usually take less than a year (which is apparently how long it takes to get an answer here :-)).
Ever Min Hachai was/is a new commentary being written by someone who wished to remain anonymous. They were looking for somewhere to put it, and thought Sefaria was the right place to do it. After some conversations between the poster and Sefaria, a mutual decision was reached that Sefaria was not the right place (at that time) for the commentary and it was removed.
As Sefaria builds capability to support modern works, it may return, hopefully with some explanation of it's origins and authorship.