Salesforce, the last known suitor for Twitter, last week officially bowed out of the running for an acquisition deal, a move that forces the embattled company either to look for a new savior or find some internal answers to its lingering inability to find a winning growth strategy. Salesforce walked away from the deal because it wasn't the right fit, CEO Marc Benioff said. Salesforce was one of several technology and media firms reportedly vying to scoop up Twitter after it signaled interest in a sale to outside investors.