The thing is, Millie has had the holidays etc, but maybe she's now realising that she could have had the money instead, and put it to better use. It doesn't look like her parents have given her any choice in how it was spent, which is unfair because it is HER money. She and her kids have been used for loads of episodes; they deserve to be compensated. Money should be put in bank accounts for the kids when they grow up, and Millie should get her cut too.
I think it's absolutely time that these vlogging families were looked at, and restrictions placed on how they exploit their kids and sell their privacy.