Statistically speaking, you're more likely to buy a second object right after you bought one than someone who has not shown interest in the product. Things break, you might want to return it for a slightly different version, you might buy one for a friend.
For you, it might be wrong, but when the advertiser is buying millions of ad impressions and is looking for a 0.01% hit rate, the math shows that you're one of the more likely future customers.
Which makes at least a little sense when I'm on another site. But just this morning, Amazon started "recommending" a product to me that I'd actually bought from Amazon two months ago. How many printers does Amazon think I need?
Of course, as you note, printer companies realized people were actually doing this (due to the perverse incentives created by their ridiculous razors/blades business model) so now most printers come with pathetic "starter" ink cartridges that run out after about 10 pages.
The irritating bit though is that many cartridges don't last long (intentionally and unintentionally) once you open/install them, regardless of whether you actually print anything. So, if you don't print a lot, it might still make (financial) sense to buy a new printer... ;-[
I am tempted though to get a model with refillable ink tanks, but most of what little printing I do is on an old b/w laser printer which I've had forever. Still looking for the holy grail color laser printer that is cheap, networked, duplexing, compact, and can print photos.
If "the externalities are not fully priced in", isn't that just good for me? I hate to say it, but my financial situation hasn't been great recently; I might just go for it.
