from the about page:

Standard Ebooks is organized as a “low-profit L.L.C.,” or “L3C,” a kind of legal entity that blends the charitable focus of a traditional not-for-profit with the ease of organization and maintenance of a regular L.L.C.

corporations cannot make "personal copies" of copyrighted works, otherwise they'd buy just one copy of microsoft office

This isn't correct. It is infringement, for example, to write Harry Potter fan fiction in private on a typewriter, even if another soul never sees it. Copyright includes creation, not just distribution