0%. I work as a upwork freelancer. More precisely by hourly rate and upwork desktop app takes screenshots at random times, so i can't really browse HN and other sites. But I will tell you honestly, i don't want to go back to normal work. I get shit done( there is also that "gambler" feeling, when you see how much money you earn each week ) and in good quality( I get reviews from my clients, so i can't code bad either ).

So yeah, a hour paid is a hour worked.