The freemium model is closely related to tiered services.
In 2014, Eric Seufert published the book Freemium Economics, which attempts to deconstruct the economic principles of the freemium model and prescribe a framework for implementing them into software products. As well as for traditional proprietary software and services, it is now also often used by Web 2.0 and open source companies.
In 2009, Chris Anderson published the book Free, which examines the popularity of this business model. Jarid Lukin of Alacra, one of Wilson's portfolio companies, then suggested the term 'freemium' for this model. Give your service away for free, possibly ad supported but maybe not, acquire a lot of customers very efficiently through word of mouth, referral networks, organic search marketing, etc., then offer premium priced value added services or an enhanced version of your service to your customer base. The term freemium to describe this model appears to have been created only much later, in response to a 2006 blog post by venture capitalist Fred Wilson summarizing the model: Thus little is lost by giving away free software licenses as long as significant cannibalization is avoided. The model is particularly suited to software as the cost of distribution is negligible. This is often in a time-limited or feature-limited version to promote a paid-for full version. The business model has been in use for software since the 1980s.