Shares of AOL spiked more than 13% by midday Wednesday after the company reported a 10% jump in ad revenue and profits that exceeds consensus analyst estimates in the fourth quarter. Ad revenue was $364.8 million for the period, up from $331.6 million the year before, helping to offset an 18% drop in subscriber revenue. Net income was $22.8 million, or $0.23 a share, or $0.06 higher than Wall Street estimates, according to a survey of analysts by Thomson Financial