I've even seen this for what the companies must know is a once-a-decade purchase, like a big lifetime-warranty espresso grinder. It's not like I need a second one! Offer me some accessories instead, dammit.

Hmm, could there be something in the analytics that could be used to claim, in aggregate as opposed to you personally, that the ads influenced your buying decision, hence demanding a higher price, perhaps for future ads? Coz it doesn't make sense why they'd do that.