[traverseda]

Having a website, showing up in search results.

Being in the yellow pages.

Putting a flyer on a community board or telephone pole. My city has special poles just for flyers.

Word of mouth.

Newspaper ads.

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Sure, some of those are advertising but they're not intrusive or unethical. There aren't as many options for ethically advertising online but that's very intentional, with companies doing the digital equivalent of limiting word of mouth and tearing down flyers.

[mocamoca]

Intrusion-wise I agree, those communication channels are more "pull" than "push"

Even though the search engine is ad-funded (I don't know any free search engine) and can be more or less intrusive (IE. Duckduckgo is not)

Which channels have been intentionally nerfed?