This is why Book 2 is ending early. Starz doesn't want to spend the money.

They could either have Book 2 go up to 6 seasons or just end it and make new spinoffs where they'll have to spend less money for production and hire brand new actors who have less of a name.

OG Power only had 6 seasons because that show was carrying the network. Now that the brand is established with multiple spinoffs Starz can just end these shows at like 3-4 seasons and churn out a new one. It sucks but it's business.