I think they buy all the Dior, White Fox, Drunk Elephant, Tik Tok trendy stuff to keep Esme sweet and prove to her this escaping the matrix lark is working.
It's all fun and games at the moment, no homework, no exams, no getting up at a certain time and endless holidays and daily shopping but Esme will expect something in return for the education and life she's given up.
She won't be like Isabelle at 18, passive and childlike, she'll, quite rightly, expect a car, money for a house and her set for life fund so Creepy had better get on with earning some big money or perfecting his sob story about how the haters/Lazy/anyone but him are to blame for everything going wrong and there being no money.