Reformed twitterer and hedge fund manager Doug Kass now says that he would be willing to pay $32.50 for Twitter stocks, expecting that the share price will quickly double following the company’s IPO set for next month, Steven Russolillo for The Wall Street Journal reports. Kass was an avid Twitter user until he quit the service in July, saying that it was useless and full of ‘haters’. He returned earlier this month, and now believes that it’s about to be one of the most attractive stocks available. Twitter’s current monopolistic market position “Given the lack of competition in its space,…