[djhworld]

> To me, the stupidest simplest solution is probably the most likely - some naive marketing analyst probably just grouped all traffic coming from the same IP address into the same bucket and blasted ads to them based on recent Amazon purchases at the same IP address.

I agree with this as well. I've been living back at my parents house for a bit while I'm between properties, and I definitely see ads for stuff targeted at my parents. Sometimes I worry there might be a privacy breach there, e.g. my Dad has been suffering from a condition recently and I've seen ads for coping with it come up on my computer, most likely based on his google searches or whatever.