Tickets can only be purchased on the day of visit.
Such assets will only be purchased if they stand to make a return.
"Girl Scout Cookies," it declares, "can only be purchased from girls during cookie season.
"Increasing control over the product can only be purchased by the increasing depersonalization of the entire process," Kass says.
Currently, PrEP can only be purchased from a pharmacy with a private prescription from a registered medical professional.
How often should you communicate with your customers, when you have a product such as a car or expensive jewellery that may only be purchased every few years?
If, for example, a customer wants Nike sneakers, and Nike sneakers can only be purchased at FogDog.com, no amount of competitive comparison would have an effect.
Obviously, there's a crucial difference with normal publishing: while most books can be sold anywhere, Unbound's books – at least during the initial pledging stage – can only be purchased on the company's wesbite.
Moving on to the liquor cabinet (or liquor closet, as the case may be), Mr. Clarke said it was not atypical for a serious geek to possess "around 100 kinds of rum, or brands of genever that can only be purchased in Amsterdam, or odd little liqueurs and vermouths and amari that have been picked up in offbeat stores".
That subscription, which can only be purchased with a voice command directly from an Echo, also enables Amazon to push its other killer app: a collection of smart voice controls that let users ask for music from the smart speakers without needing to think of a specific artist or song.
