Marginal utility is not just about functionality utility. It simply means how much utility you derive vs. the next best thing. For some, a $10k watch is worth it, as it gives them convidence and increases their social standing. TapBots is betting on people deriving $15 more value than whatever the $5 app is.
The value is not all about how well it does Twitter. Many Mac users will buy it so that they can talk about it with other Mac users. That's part of marginal utility as well. TapBots has won the respect of Mac opinion makers, and that respect is cash in the bank.
The value is not all about how well it does Twitter. Many Mac users will buy it so that they can talk about it with other Mac users. That's part of marginal utility as well. TapBots has won the respect of Mac opinion makers, and that respect is cash in the bank.