Even if Google did provide a provision for blocking ads for certain keywords (and they do have one), who controls that system? Amazon is also a bad example since many 3rd parties affiliated with - and driving traffic to - Amazon buy those keywords.
Even if Google did provide a provision for blocking ads for certain keywords (and they do have one), who controls that system? Amazon is also a bad example since many 3rd parties affiliated with - and driving traffic to - Amazon buy those keywords.
Yes, you're right that buying one's own brand keywords is a defensive move. The idea that Google would show a relevant ad for a competing e-commerce site when a user is searching for "Amazon" isn't scandalous, it's the business model.
Rank-based advertising, like in search results, is fundamentally unethical. To do it ethically would require perfect comprehension of what the searcher is seeking, so that you can prioritize organic, helpful results. Google never prioritizes organic results.
This sort of anti-competitive coercion through overwhelming market power is why monopoly laws exist in the first place.