Investors have hammered Mark Zuckerberg and team over their slowness to capitalize on mobile use of its users, Bloomberg reports. That’s in addition to Bloomberg’s report that demand for Facebook’s IPO has been weak. Meanwhile, CNBC and Reuters reported the IPO is oversubscribed. Lastly, (and perhaps ironically given the prior statements), the FTC has reached out to Google and Twitter to discuss possible anti-trust issues with Facebook’s acquisition of Instagram. [Source: Bloomberg]