Coinstar has evolved from a growth to a value stock, based on its low margins and cash-generating business models. This is a cash cow and will continue in this groove for several years. As several analysts have observed, the move from DVD to streaming video will benefit CSTR because as brick and mortar rental stores close, Redbox will continue to provide DVD rental solutions. Even the Verizon streaming video deal includes a kiosk rental package that will support the DVD business. You can read more about CSTR's move from growth to value stock in recent articles in MotleyFool and InsiderMonkey.
I'm not sure why you say "low margins." Operating margins are 12%. Net margins were 7%. And with each passing month, CSTR pricing power grows - they charge only 20%-25% of what competitors charge for rentals (well, 50% in practice as folks typically hold onto rentals for 2 days). They now own almost half the market, and should climb up to 2/3 or 3/4 within a few years. And they have plenty of room to increase prices.
Increasing prices by 30 cents per day would boost profits by over $5 per share (after tax!). And that factors in some drop in demand as the rental fee climbs to $1.50.
Btw, 7 of the current top 100 sellers in Amazon electronics are DVD players. DVDs won't die as fast as most people think.
DVD rentals may be a declining market, but that doesn't mean there isn't potential revenue growth there for CSTR. I'm not as sure about how the other ventures will pan out, but there's a lot of cash (and future fatter margins) left in the DVD rental business.