from my understanding tinashe was medium level internet famous but she wanted to be a beyonce/rihanna level. there's nothing wrong with being underground. she was not content with her level & abandoned her fanbase. so not only was she going into hollywood with now zero fans but she was also labeled a sellout.
women support female artists that they want to be (not just their music). beyonce is the "perfect" beauty/entertainer/bad bish. rihanna is the beautiful, sexpot bad girl. Tinashe hasn't really created a desirable or consistent image. one minute she's flashing her breasts and the next doing stuff like this photo below or the snapchat rants about people not supporting her. on the LSA forum fonts often call her desperate. i do think she's a bit impatient, success will come if she lets it. rihanna didn't blow up immediately & neither did bey.
as for other black artists, i think in part that is due to wanting to crossover. once you decide your fanbase will be white then you put your future in white hands. whites prefer whites. altho i dislike k michelle's music, i do think she's a good example of being content with your fanbase. i don't see her trying to appeal to whites or corporations. her, fantasia, keyshia cole and a few others that get joked on for doing the "chitlin circuit" are going about things the right way imo. appreciate your fans and they will support you. they might not be a success to others, but they don't have issues selling out shows
You hit the nail on the head
The suburbanite side of Tinashe will probably keep her from appealing to black women....She's kind of nerdy,and the fact she's good looking only makes things worse because she will probably be considerd bougie.....She's not very relatable to black women overall I don't think,at least not black women who would be the target you want to sell albums too....And you HAVE to go through black women first to be a rnb pop/star....Ciara had to get poppin off Goodies and Ohhh before she start making those crossover records,Beyonce was making Say My Names and Bills Bills before she crossed over,Round of Applause and that short haircut all the black chicks wanted blew Rhianna up
.....You gotta appeal to the black women and make the white folks come to you and Beyoncé has been pretty consistent at that,i give her props on that.But lets be honest it was mostly black men writing for these women back in the day....So if men cant speak to womens emotions from a male perspective nowadays,how they supposed to be able to speak to women from a womans perspective
? Rnb is mostly in a sad state right now as far as writers,its not emotionally driven....and these bytches just aint that cool no more
That's crazy to say, but if ur a white female singer(Katy Perry, Swift) you got the pop/hip-hop crossover covered, you got the heavier/serious stuff with Adele. It's really amazing though b/c to me it's alwaus kinda been that way(Britney Spears/Aguilera, etc), BUT say like 10-12 years ago you still had Ashanti, Amerie, of course Mary J, Toni Braxton, and more. It's weird b/c it's almost like the young Black female FAN has disappeared. 
Why is there not even a TV show for such music videos anymore?
, ain't nobody checking for Beyonce singles if they don't have profanity and veiled sexual references.
from the kids let me know true soul music is gonna die out with 80's babies. Death of R&B is worse than hip-hop's death because it's history goes back so much further, and it appears it's going to just be extinct in the near future