Please , Selena has been away of social media since 2017. She sent Britney's picks for Rare Beauty, she did not send a Promo Package like she has done for other celebs.
Selena already talked about the documentary and said she wants to her britney herself instead of other people speaking for her.
Cassie does not work with Selena, Crowdsurf stopped handling her accounts in 2017, she's with West Of Fair Fax now
I think they have collaborated in the past before selena's 2016 rehab because they literally had the same writing /production team . Other theory is that Selena's team bought a sample of DGKOMD and she signed something with the team con. I need selena to say free britney but on the other hand we know that she doesn't run her socials and it seems that the information that goes to her is really restricted by her friends that live with her