Modern-day business model offering partial complimentary goods

• Pricing model for many apps
• Business model in which only the deluxe version of a product costs money
• Sort of pricing model with multiple tiers

Wikipedia Word definitions in Wikipedia
Freemium is a pricing strategy by which a product or service (typically a digital offering or application such as software, media, games or web services) is provided free of charge , but money (premium) is charged for proprietary features, functionality, ...

Wiktionary Word definitions in Wiktionary
a. Offering basic services for free while charging a premium for advanced or special features. n. (context countable English) A product that is offered free of charge and supported by sales of a premium version.