Customized Internet advertising is a weird thing.
Sometimes it is spot on and even suggests purchases you'd never dreamed of but totally want once you see it (whether or not you'll actually buy something is another thing).
Often, you are bombarded with ads for things immediately after you've purchased something like that on the Internet. But, usually, you don't need any more of that thing at that point.
Other times, its just wild and weird. Today, for example, I've been getting advertisements hoping that I'll buy a $1.5 million plus apartment in a high rise in Manhattan. Who knew that I was in the market for one of those? (Unless the Internet knows something that I don't.) My best guess is that I've been reading the New York Times more than usual.