>>> It gets weirder
Not really. Like many, many other sites, The Answerbank uses tracking cookies, so that your (apparent) interests on one site can lead to you seeing relevant ads, both on that site and on other sites which use the same system.
So if you're looking at posts about hats on AB, you can expect to see ads for them appearing here. Similarly, if you search on Amazon for shower fittings, and then come to AB, it's highly likely that you'll see ads for shower fittings here on AB.
Such things are common across the internet but, as The Answerbank is actually run buy a company that specialises in digital marketing (SilverDisc Limited), it should be no surprise at all when such targeted ads appear here.