In short? NONE !!
They all have own interests, most getting paid for the reviews, some in the reviewed tokens, some in BTC, but most in $$$$ !
I think there is great opportunity for content creators in the crypto world to act more as journalists than billboards. The audience you can amass by telling the truth and being objective will go a long way as people are seeking experts who aren't necessarily in it for the money.
And of course, you can monetize an audience like that without completely selling out like some of these YouTubers and websites that are making huge bucks giving favorable reviews to projects they wouldn't even put their own money into.