It seems like everyday Amazon is adding some new “free” benefit into its popular subscription membership service Amazon Prime -- free videos, free music, free book rentals. The list goes on and on. The same goes for lots of other vanguards of the subscription economy. Google launches a few free apps that make living your life and work just a bit easier; Netflix ships a brand new batch of kids movies that would’ve cost $1000s in Blockbuster rentals back in the 90s; Tesla pushes a few wireless updates and suddenly your car just got better at driving itself. These subscription economy companies are the envy of entrepreneurs everywhere who want to surprise and delight their customers with new and unexpected features and benefits seemingly with a spirit of unbounded generosity.