A recent White Paper from consulting company Cartesian confirms this assumption, calculating the churn-rates for a number of different types of video service-provider (see Figure 1), and quoting Parks Associates’ conclusion that “a typical over-the-top provider experiences churn of 60% annually, which is three to five times more than a traditional Pay TV provider.”

From the article "Cartesian: Why It Matters That Churn Is Higher For OTT SVOD Providers Than For Traditional Pay TV Operators" by Barry Flynn.