Twitter is reportedly in early discussions with Google, Salesforce.com and others about a possible takeover of the San Francisco-based company. “Twitter is considering divesting itself of … Vine, the mobile six-second video service, and MoPub, a mobile advertising business,” according to The New York Times. Stalled growth has been a challenge for Twitter, which has largely failed to keep up with competitors in recent years. Facebook’s “offerings like Instagram, WhatsApp and Messenger continued to outpace Twitter in user growth and profitability, while five-year-old Snapchat has become the newest darling of the social media world.”