Fig. 4From: 23andMe: a new two-sided data-banking market model a Increasing investment in 23andMe over time. Decrease in kit price over time. November 2010: $399 or $199 + $5 less (at least one year). March 2011: $399 or $99 + $9 per month (one year). b The almost exponential increase in the number of users coincides with the falling price of the kit to $99 in November 2012 [1]. c Increase in the number of users over timeBack to article page