It seems that not all shows will be commercial free, however.
I understand that they must have special arrangements with those producers, but it feels very odd.<p><pre><code>    Will all shows and movies be commercial free?

    In response to feedback from our viewers, 
    we started offering a commercial-free experience
    on Hulu. For a small number of shows, however, we 
    have not obtained the rights to stream commercial 
    free and they are not included in our No Commercials
    plan. You can still easily access these shows with 
    short commercial before and after each episode with no 
    interruptions during the episode. Specific shows that
    still have commercials accessible through the No Commercials 
    plan will be noted throughout the signup, switching, and
    playback experience. While the list of shows may change,
    these shows are currently: Grey’s Anatomy, Once Upon A
    Time, Marvel’s Agents of S.H.I.E.L.D., Scandal, Grimm,
    New Girl, and How To Get Away With Murder.</code></pre>