I just don't see how you actually know you're going to get a good quality product without research. Since you have to research to know if the product seen in an advertisement is good anyway, if you do your research well you will come out of it with some good quality products in mind, and can then simply search for vendors. Nobody ever puts the negatives in their ads - why would they - so at best they're triggers to buy a product you probably don't need (after all, otherwise if you needed it you wouldn't wait for an advertisement, you'd be researching, or just buying whatever was at the top of the online store.)
Basically I don't see how a targeted advertisement ever helps me. I find myself in these scenarios:
- I need a product, say a new pair of shoes. Since I need these, for example in the situation where my current shoes are literally falling apart of inadequate for the weather, I will simply start doing research, asking people, etc. I don't need targeted ads here, and they don't target me based on product quality, so there's no point paying attention to them anwyay.
- I don't need a product: well, then I don't need an ad for it either.
- I'd like a product, say a new luxury pair of shoes I don't need. Well, why should I trust an ad? Upon seeing an ad I'll just go and research it anyway, since again, nobody will list the negatives of their own product in any advertisement.
- I need a product, but am unaware it exists: the only area where a targeted advertisement really makes sense, since it saves me time (I don't know I should be researching it because I'm unaware it exists). But, uh, I've literally never had this happen ever in my life, and I'd be curious if anyone has any examples.