I knew about those but you've only named 2 . I just thought if the blogsites were mainly ran by foreign black women, I'd see something with statistics.vWhere you been? We even had a few threads about it here. But here are some breadcrumbs for the intellectually uncurious.
The Shade Room aka TSR is a media company, founded by Angelica Nwandu in March 2014
The Shade Room - Wikipedia
The website was founded by Fred Mwangaguhunga, a former corporate lawyer.[1] Mwangaguhunga was born to Ugandan parents in Washington, D.C.,
Media Take Out - Wikipedia
Now if it read the most popular gossipy black blogs item are ran by thus, then that be easier to agree and quantify