At least big gaming sites are pretty straight up with their sponsorships.
It's probably a good thing that reddit seems to have been too incompetent to enshittify their site completely yet. There's lots of it that has been, but there's still plenty of very good discussion there if you know where to look.
That said I suppose if good moderators filter the rabble out there's bound to be some good communities. I just find that if you love a game it's usually best to steer well clear of the subreddit for it.
This is key and one of the reasons that ignoring r/gaming and subbing to r/games instead has been standard wisdom since like 2010 when reddit actually had a guide to which frontpage subs to unsub from (r/pics, r/funny, etc.) and which ones to replace them with.
They seem to care very little about the opinions and taste of the people producing content for sites like IGN.
> one streamer doesn't have nearly enough time to review all the games that come out. Not even just the AAA titles!
They usually specialize in a genre, and a lot of gamers are interested in a fairly narrow range of genres.
But also, you don't have to know about every game available. "The perfect is the enemy of the good", also with respect to information. The goal is really just to find enough games worth the time/money to keep oneself entertained. Life's too short to worry about whether you might have enjoyed something else more than the game you actually played. (If you can even justify spending time on video games at all....)
> how are gamers making their decisions about what to play next
Metacritic, Steam reviews, the aforementioned streamers, word of mouth in their own communities... probably other ways....