Through hearing about the product from neutral third parties.
If I want to buy a computer I can read objective reviews that tell me about the pros and cons of different computers.
How does the “neutral third party” get information about the product? Surely not through the actual producer of the product or service! Why, that would be advertising!
I think that you are reading the word advertising as more general than it was intended. Craigslist is full of ads, in a narrower sense than you are talking about. And yet it doesn’t have advertising in the problematic sense.
So, how would anyone ever find out about a new product or service without advertising?
Through hearing about the product from neutral third parties. If I want to buy a computer I can read objective reviews that tell me about the pros and cons of different computers.
How does the “neutral third party” get information about the product? Surely not through the actual producer of the product or service! Why, that would be advertising!
I think that you are reading the word advertising as more general than it was intended. Craigslist is full of ads, in a narrower sense than you are talking about. And yet it doesn’t have advertising in the problematic sense.