Purchase Movie option after Rental
After you rent a movie for 5.99 if you really like the movie, give the option to purchase the movie by requiring the difference between the rental price and the purchase price. If the movie is 14.99 to buy, after spending 5.99 provide the option to purchase for 9 additional dollars.
It would be nice if they added an option to gift a movie as well
Movie studios don't allow it. They control these policies, you need to petition them