Verizon has formed a new subsidiary called Oath that’ll house what’s left of its two recent digital advertising acquisitions: Yahoo and AOL. The formation of Oath, which comes as Verizon closes its $4.48 billion acquisition of Yahoo’s operating business, signals Verizon’s increasing ambition to marry its telecom and wireless businesses with its portfolio of digital advertising and publishing brands. But there’s little reason to think Verizon can successfully build out a digital media empire to compete with Google and Facebook from the corpses of two 90s-era online media companies. Verizon has some 108 million wireless subscribers and 7 million wireline broadband subs, all of whom it can deliver targeted digital and advanced advertising to. Verizon is hoping to leverage the…