(Reuters) - Twitter Inc pulled in $1 billion (£771.37 million) in quarterly revenue for the first time on Thursday, beating expectations as efforts to make its platform more user-friendly brought in more people, and sending its shares up 14% in early trading.Twitter recorded most of its revenue growth in the United States, a major market where the company will face scrutiny this year over how it tackles misinformation ahead of the presidential election in November.The company has continued..