That's a good question.
One the one hand, they told Biden to choose her.
So maybe they think she is a pushover and easy to control, another puppet.
On the other hand, she can be ruthless if she gets into power.
If she channels that meanness into achieving their goals, then maybe they will keep her.
They will use her "strengths" to get what they want and solidify their hold on power; then the will discard her.
If Biden is out and Kamala is in, who becomes VP: ?Michael?