[...] the short-messaging service is giving Dorsey a second chance, at least temporarily, to prove he can turn Twitter into a profitable business and lure more people into sharing tidbits of news, entertainment, insight and tedium. Dorsey's return as Twitter's interim CEO, effective July 1, is the latest peculiar twist at a San Francisco company teeming with the drama of a soap opera through much of its nine-year history. After being ousted from Apple in the mid-1980s, Jobs came back as the company's interim CEO in 1997 and then stayed on oversee the creation of the iPod, iPhone and iPad. Dorsey should be highly motivated to lift Twitter's stock price, which has plunged by about 30 percent since the late April release of its first-quarter results amplified investor concerns about the company's uninterrupted history of losses. Not long after he took over the reins, Costolo convinced Dorsey to come back to Twitter as an adviser — a role that cracked the door for Dorsey's imminent return as interim CEO.