Nearly 600,000 Roku users are the victims of a data breach, streamer Roku said. This breach comes after the company reported a smaller breach affecting 15,000 customers last month, it said. “After concluding our investigation of this first incident, we notified affected customers in early March and continued to monitor account activity closely to protect our customers and their personal information,” Roku said on its website. “Through this monitoring we identified a second incident, which impacted approximately 576,000 additional accounts.” The company didn’t immediately respond to requests fo…