Chris is where I got the number of warehouses, I asked him during a phone call. I do not have a direct linkable source for that, that is why I asked him over the phone after I couldn't find it.
There has been a link posted from skullkrushers.com owner announcing that he joined 4Less.
Also this comment from the owner “Amen to that man! Ugh it is soo massive for us they’re gonna put us on about 1,000 sites like Walmart.com ect it’s next level! And who they want to partner us with will blow your mind when I can tell you!”