> Well, large companies/corporations don't care about Spam because they actually benefit from spam in a way as it boosts their engagement ratio

I'm not sure that's actually true. It's just that at scale this is still a hard problem that you don't "just" fix by running a simple filter as there will be real people / paying customers getting caught up in the filter and then complain.

Having "high engagement" doesn't really help you if you are optimizing for advertising revenue, bots don't buy things so if your system is clogged up by fake traffic and engagement and ads don't reach the right target group that's just a waste.

Yeah, I almost included that part in my comment, but it still sucks.