Haven't seen these guys listed in the big sticky thread so I thought I'd post 'em up.
So far the site directs to their blog
In the Welcome to Musa post they say "The founders of Musa have worked in publishing for a long time. We are writers, editors, artists, designers, financial officers. We've seen the insides of the industry, both the good and the bad."
I didn't notice any"About Us" section though so, no idea of who the folks behind the company are.
The historical lover in me does like that they plan to fact check historical subs (as per their submission guidelines).