The hidden hero of Facebook's recent decision to add hashtags to
its platform (in late June it began making them visible to users
of its mobile apps) isn't Mark Zuckerberg or Sheryl Sandberg or
anyone else at the social media giant. It's an executive at
another company entirely: Twitter's Adam Bain, whose team has
established such a dominant position selling advertising against
the trends and topics those hashtags symbolize that Facebook
felt compelled to play catch-up.  Bain, in his role as
president, global revenue, is as responsible as anyone at
Twitter for its rapid growth. He's helped turn a company once
known for its "Fail Whale" outages and lack of a business model
into what is now a cash-spewing juggernaut. Twitter, according
to eMarketer estimates, will generate more than $1 billion in
revenue in 2014, a benchmark that leads many Internet analysts
to expect a Twitter IPO announcement early next year.  Bain, 39,
arrived at Twitter in 2010 from News Corp.'s Fox interactive
unit, where he had been respo