Earlier quoted context omitted.
Renting things is a financial tool and it can save you money. The calculation is simple. You estimate the difference between how much something costs and how much you can sell it for once you're done using it. That's your real cost to own it. Compare that number to the cost of renting it for the same time period. If the cost to rent is lower, renting is a better deal. For larger and more involved transactions (especi…
In an efficient market, shouldn't the cost to own and cost to rent be roughly the same? Otherwise, everyone would rush to the clearly cheaper option.
A classic scenario is renting a movie. Let's use DVDs as an example--even though they're falling out of favor, they're a little simpler to talk about, and the economics of online aren't that much different.
Studios like big numbers and would like to sell movie media/rights/access/whatever (it's complicated) to someone who can drive lots of demand. So the rental outlet will get a steep discount on those things for buying in bulk.
Meanwhile, you're not even sure if you'll want to watch that movie more than once, and the resale value of a used DVD after a couple years is basically zero. So renting the DVD at least the first time, and maybe every time you want to watch it, is a pretty good deal.
Case in point, Redbox's "markup" over whatever they're paying the studios is large, but it's still a pretty good deal for you and me.