Any of these sites face the same challenge — building a sufficiently critical mass of users to fuel contributions and discussions. (lawsitesblog.com)
«We love the virtual currency model,» CEO Christian Wiklund says, since it allows the core service to remain free, attracting a critical mass of users. (canadianbusiness.com)
Just because each has achieved a critical mass of users does not mean that they can't be wiped out of existence by one knock of a judge's gavel. (canadianbusiness.com)