Common pricing plans for pricing digital goods and services that are consumed in multiple units repeatedly over time include a simple per-unit plan (also called "pay as you go" or usage-based pricing), a per-period plan ("all you can eat buffet" or membership pricing), and a combination of the...

Online markets have changed as a result of people shifting massively from using personal computers and browsers to using technologically powerful mobile devices and apps. These changes cover leading online players, consumer behavior, and products. The use of smartphones and mobile apps, and the...