Maybe there's a hardware engineer out there with a decade of experience shipping and reviewing TVs publishing his thoughts to his blog. He's heard about the latest and greatest and he's offering his expectations based on the promotional material, his friends at the company, history from the brand - whatever. Maybe, if he's built a reputation of good reviews he's got a big audience. Big audience? TV brands give him an early review model.
Modern Google actually makes the content problem worse. When our notional TV blogger is starting out in our world he publishes two or three essays, nobody reads them, he stops putting in do much effort, posts occasionally, dwindles off. In a world with a perfect search engine his early essays get some attention to encourage him to post more, a feedback loop starts, and before you know it he's a full time TV reviewer.
Modern Google actually makes the content problem worse. When our notional TV blogger is starting out in our world he publishes two or three essays, nobody reads them, he stops putting in do much effort, posts occasionally, dwindles off. In a world with a perfect search engine his early essays get some attention to encourage him to post more, a feedback loop starts, and before you know it he's a full time TV reviewer.