Probably, since they separated the labels completely. Unless Mariah magically moves back to Island.

Yep. He reports to David Massey now, not Steve Bartels. LA Reid's dream team behind TEOM, save Steve Bartels, are all finding success elsewhere now--Greg Thompson is EVP at Capitol leading Katy's team, Mark Sudack is managing Kiesza (who signed with Island), Eric Wong is EVP at Island, and Karen Kwak heads A&R for all UMG artists.

Welp, here comes even less support for YDKWTD (like we had any though thus far ) and the remainder of the era.

Get money sis !

There's not an official WW source that collects sales. The digital era has helped a lot with collecting sales but really a lot of older sales numbers are estimates. That being said, Mariah has considerably higher RECORDED sales than Madonna (a lot of that is due to Nielsen Soundscan being introduced in 1991).

Mess at people not knowing what SESAC is It's like BMI where you register your songs, but it's far less popular than BMI.

SESAC is a performance rights organization that basically handles her royalties. BMI and ASCAP are also the same type of organization. All published artists belong to one of those 3 companies in the US. It really has nothing to do with her label or the people she's working with.