Comcast’s Peacock streaming service reported its first quarterly profit ever on Thursday, as the soccer World Cup and the hit reality show “Love Island USA” attracted more subscribers. Shares of the company were up 3% in premarket trading. The $189 million pre-tax profit marks a major win for the streaming service, which was a late entrant in 2020 and had to spend billions of dollars on content to establish a foothold in a market dominated by Netflix, Disney+ and Amazon Prime Video.