Advertisers HATE unmoderated user-generated content. The UGC on Reddit is probably the most extreme for any mainstream website. How are they going to make money? No advertisers will touch them in the current state.
I don't think what you're saying is true at all.
Companies willing to run ADS in a non curated venue get traction the others do not.
People talking freely will say thing the company may not like. That is no big, unless they make it so.
They will also say a lot of other things, including stuff the company likes.
And that is where the traction comes from.
The Internet natives hate corporate bland and prefer real discussion.
[1] Squarespace isn't in the Fortune 500 because they're 575th, so it's close - https://fortune.com/company/square/fortune500/
[2] Toyota isn't in the Fortune 500, but they're 10th in the Fortune Global 500 - https://fortune.com/company/toyota-motor/global500/
[3] BSkyB is not in the Fortune 500 size, but would be about 180th by revenue if it was.
[4] British Telecom, which is not in the Fortune 500, but would be about 100th by revenue if it was.
Why?
Is it because if the public sees their ad next to some gross content they'll do boycotts?
I'm curious if anyone has numbers available to see the extent to which businesses are impacted by all these "don't buy X" 'cause they advertised on Y and I don't like Y.