After you create a Studio account, you will be able to add models by yourself or you can give your models (or other models that work for you) a personalized link to create accounts for themselves. So any model who creates a SkyPrivate account using that link will be automatically added to your Studio. You can find the associated link by logging into your account and going to Studio-->Add Model.
You will have permanent access to any model's account that is under your Studio, so you can make any change/settings to it.
The models who are under your Studio will have the same features as a normal account BUT the money they earn will be automatically forwarded to your Studio account.
This means that you, the Studio, will get all the money of your models, and also you can pay them and let them withdraw using their card (using the methods listed here).
John pays your model, Jenna, with $100. This means that you, the Studio, get $100 that are forwarded to your Studio account. When you want to pay Jenna 50% from your profit, you can send to Jenna's SkyPrivate account $50 (the 50%).
Jenna can withdraw her money ( the system will keep 25% from the amount - $37.5) You, the Studio, will have the remaining $50 and you can withdraw it (the system will keep 25% from your withdrawal, so you will have $37.5).