Ketchup faces a familiar problem for social apps: the lack of a critical mass of users.
Challenges: Getting a critical mass of users to "like" and review particular dishes at independent restaurants.
You guys have the best critical mass of users, but there *are* alternatives".
Gaining a critical mass of users will be an uphill battle for most e-mail startups.
No, the real challenge is gaining a critical mass of users.
For a social network to work, you need a critical mass of users who set the boundaries.
The first goal of MUOD is identifying outlier users that present significant differences from the mass of users.
"It's still not something that the big mass of users will be able to do," Cohen-Or says.
But the site failed to attract a critical mass of users, and we shuttered it in August 2007.
MUOD identifies three types of outliers: (a) Magnitude outliers, whose associated signals present a magnitude significantly different from the mass of users; (b) Amplitude outliers, whose associated signals present an amplitude significantly different from the mass of users; (c) Shape outliers, whose associated signals present a shape significantly different from the mass of users.
Once a company gets a first-mover advantage, the mass of users adopting the company's application or platform makes that product more attractive to the next user.
