As Twitch, the livestreaming service for video games, grew big enough to attract Amazon’s attention, other big online players have also been pushing into broadcasting territory. Facebook Live and Periscope, owned by Twitter, recently joined that niche. As long as people seem interested in the product, these tech companies will likely continue to build out broadcasting services and seek ways to monetize them. On the creator side, live streams create new ways to connect with fans and to promote big events. And the approach can be financially rewarding; with Twitch, some people have successfully turned gaming from a hobby into a full-time job.