Yasss get that exposure. This is actually honestly good move for JoJo since she's practically marketed as a new artist especially to 5H's young demographic that probably don't know her.
Honestly, this is kind of embarrassing. I guess she really wants to get back in the limelight, but if you have to open for Fifth Harmony at this point in your career, than maybe mainstream success isn't for you. I wish her the best because she is very talented, but this is beneath her imo.