Not surprising. Netflix, Comcast, Amazon Prime and other video streaming service charge you the same as the DVD rental, but force you to watch the entire video within 48 hours from 1st starting it.
Personally I find this very annoying (why do the do this? What does it cost them to let me watch it within a week or so and not 48 hours?).
Esp long movies like "Wolf of Wall Street" are not practical to watch in a single sitting.
I have a Samsung DVD player that I got for 40$ and depending on the movie, I find it's cheaper or same price to actually BUY the DVD from Amazon.com (with prime). Ex: Wolf of Wall Street was $4.99 to stream and view within 48 hours, or keep paying $4.99 until you finish it. The same DVD ( NEW ) was selling for $5.49 on Amazon, Free shipping so I ended up buying the DVD.