They're definitely not useful for proper investment decisions, but they can be a good idea to learn something about what's going on. Sort of like, just to catch up with what's out there.

Mainly because they're paid to list those reviews, if they're not paid then they're posting those reviews to earn bounties. So either way, you know they're saying something good, or can't say something too bad, or they won't get paid or not get enough bounties.

They're ok for finding websites, channels, etc. But nothing you can't find on your own.