Stylebot or Stylish (Chrome/Firefox) and nuking such interstitials helps.

I've started adding same to my default stylesheet as block elements.

This covers a lot of sins:

    [class*="modal"], [class*="popup"], [class*="overlay"],
    [class*="interstitial"], [class*="social"], [class*="cookie"],
    [class*="flyout"], [class*="colorbox"], [class*="Modal"], 
    [class*="Popup"], [class*="Overlay"], [class*="Interstitial"],
    [class*="Social"], [class*="Cookie"], [class*="Flyout"],
    [class*="Colorbox"], [id*="modal"], [id*="popup"], [id*="overlay"],
    [id*="interstitial"], [id*="social"], [id*="cookie"],
    [id*="flyout"], [id*="colorbox"], [id*="Modal"], [id*="Popup"],
    [id*="Overlay"], [id*="Interstitial"], [id*="Social"],
    [id*="Cookie"], [id*="Flyout"], [id*="Colorbox"] { 
        display: none; 
    }  

(Though it may also have false positives.)