11. Examples of Development and business models

Development Model

 Django is a python based web framework which is free and open-source. It allows you to rapidly develop secure and maintainable websites and it's relatively easy to use. The biggest advantage of Django's open-source model is it's potential of development and makes it thrive with numerous contributors as there are no special development tools needed to improve Django.

Business Model

 Spotify is an example of a Freemium/Software as a Service business model. It lets you listen to all the songs and use almost all of it's features for free if you use it on a computer but it will run ads every so often between the songs (and I noticed that the more you use it the more frequent ads get and it gets quite annoying). The mobile free version however limits you only to "Shuffle Play" so you can't select specific songs you want to listen to and you can only skip 6 songs per hour. Spotify is a streaming service of course, so you need internet connection to use it. The premium monthly subscription removes all those limitations and ads as well as letting you download songs to listen to them offline.

Sources:

1. Django documentation: https://docs.djangoproject.com/en/dev/
2. Django Introduction: https://developer.mozilla.org/en-US/docs/Learn/Server-side/Django/Introduction
3. Free Spotify vs Spotify Premium: https://www.soundguys.com/free-spotify-vs-spotify-premium-36632/