FYI, Mark Cuban's pharmacy only deals in generic medications. Most of the "step therapy" programs exist to gate the non-generic medications, so you wouldn't be finding them at Mark Cuban's pharmacy anyway.
Also, you don't need insurance to use a traditional pharmacy. You should still cross-shop online regardless.
I think too many people have misinterpreted Mark Cuban's PR as having solved all of the problems with insurance, but it's really just another retailer of generic medications like countless others online.
They said they plan to do their own manufacturing in the future, but at the moment they're buying from the same wholesalers as all the other online discount pharmacies. They've just attached Mark Cuban's name to this one.