It's fine for things that people don't have a commercial interest in manipulating. But yeah for buying mainstream products (laptops, TVs, hoovers etc.) it's completely useless. Even Amazon reviews are better (at least in the UK; I understand they may be worse in America).
Tbh I would not be surprised if spammers start posting LLM generated comments with affiliate links on Reddit. Maybe they already do.
These days I see mostly SEO spam articles for any topic that has even a modest amount of search traffic, commercial or not. Like if I search for how to do some random DIY home fix, or lookup information about a sort of niche topic, the front page will be 10 terribly written (likely automated) articles that all summarize the exact same points as each other. Clearly they have all copied from the same source. It's crazy how hard it has become to get Google search results from a human that put a bit of original thought into something.
Tbh I would not be surprised if spammers start posting LLM generated comments with affiliate links on Reddit. Maybe they already do.