Amazon.com — When printing a mailing label for returns, the site offers a link to send it to a friend in case you don’t have a printer.
Kleenex tissues - change the color of the tissue off-white as you approach the end of the box.
Etsy – When writing a review, the site gently encourages you to the requisite five words and beyond.
Gamificar sin divertir
Mi sobrino Adriel acaba de cumplir 6 años y, como tantos niños de esta época, juega con el móvil de su padre desde que tenía...
“The users complete the design.”
(paraphrasing Marcel Duchamp)
“Objects that don’t move don’t interact. An interaction is some sort of communication, and communication is about movement.”
Unclutter - When the app crashes it congratulates the user on finding a bug before asking to report it.
Turntable.fm - the subscription model has a slider which makes the monkey content to ecstatic depending on how much you want to pay.