[rvba]

They dont want to feed their model with garbage data, or this data is read and revieved by real humans

I remember years-ago (2008?) I worked in a company where every mention of it was manually reviewed by someone from PR department. I imagine now the tools are even better.

Different thing is that discussion is often very low quality (forums died for multiple reasons, reddit is dying too - astro-turf gallore now)