Have you noticed that the targeted advertising from Amazon, eBay , etc. is deeply flawed?
They don't understand the difference between being interested in the GWR (like me for instance) and general interest in railways. So I keep getting offers for books about the Southern or the LMS, or heaven forbid, BR! (Urgh! )
It's like sending an Arsenal supporter offers for Man City merchandise!
I think this is a major failing for modern deep-profiled marketing and it should be sorted out!