This claim is pretty confusing. Is it saying on 1/5 of US cable subscribers watch ESPN or that at a $30/mo price point only 20 million people would subscribe? I

This claim is pretty confusing. Is it saying on 1/5 of US cable subscribers watch ESPN or that at a $30/mo price point only 20 million people would subscribe? If it is the latter is basically answers nothing; would 40 million people subscribe at a $15/mo price point or 80 million at a $7.50/mo price point?