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F-Growth - key factor in Freemium 


The "growth factor", which
combines both virality and retention, is proposed as the metrics of the overall freemium system performance in terms of the user base growth.  
If the "f-growth" is less than one, the product needs further development. If the "f-growth" it is greater than one, the system retains existing
and attracts new users, thus a large scale market launch can be successful

more...

VIRALITY, RETENTION, AND THEIR INTERRELATEDNESS VIA F-GROWTH

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...Having achieved a positive value of F-Growth, one can mobilize a round of venture investments and advance the product to a major market. In the opposite case, if the project is incapable of increasing its user base, i.e., F-growth < 1, the raised money will be wasted.

K-FACTOR - NOT THIS:-)

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...But neither the author of the blog BassDrive Richard Fong, any Wikipedia article, or even Harry Harrison in his story "The K Factor" do not account for much. 
Blindly borrowing a term from Nucleonica and Epidemiology they believe that it is enough to "infect" the newcomer as the user base to expand...

PARADOXICAL MOTIVATION

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It’s a curious fact, but an attempt to motivate users often leads to a very paradoxical consequences.

In our project i2istudy the “game currency-minutes” can be earned in two ways by acting as a “teacher” and by inviting friends. Wanting to earn extra money...

(c), 2012-16 Ilya V Osipov (ilya Os)
The site opened in 2014. Some of the materials are copied from the personal blog of the author and private accounts of social networks. 

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