Fair question. I am chiefly concerned with the promotion of corporate goods or services. Authentic 'public service announcements' ("Smokey the Bear implores you to stop setting things on fire", etc) do not bother me, since the interests of the 'advertiser' and the target audience are reasonably aligned in cases of genuine PSAs. I consider personal advertisement ("I have a patreon" or "please hire me") tacky, but not nearly so bad as corporate propaganda on account of the relative power dynamics.