How they do it: Regular use of the LinkedIn platform is free and users can use the majority of the functions. However, LinkedIn offers various premium subscriptions allowing users to unlock even more functions or more intense use (e.g. unlimited profile searches).
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How they do it: Hotmails basic inbox and email service was offered to customers for free. However, the inboxes came with limited storage for messages. Users could upgrade their storage by paying a monthly or annual fee.
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How they do it: Amazon is giving away a free 1-month trial for its premium subscription ”kindleunlimited” which allows the customer unlimited access to media such as e-books, magazines and audio books for a flat fee payable every month. This enables customers to test the service and Amazon to upsell the full subscription to users of the free trial.
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How they do it: Much of Skype’s service is free. Skype-to-Skype calls to other users are free of charge, while calls to landline telephones and mobile phones (over traditional telephone networks) are charged via a debit-based user account system called Skype Credit.
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How they do it: A basic version with limited hosting space is offered to customers for free. However, customers then have the chance to purchase subscriptions for larger amounts of storage space.
Learn more about Dropbox →