&gt; <i>since we&#x27;re doing anecdata, I just checked my Amazon front page. Many things are irrelevant, a few comical (I recently looked at a 80-book box-set of Penguin classics[1], now it&#x27;s systematically recommending each individual member of that box-set to me :-&#x2F; )</i><p>I&#x27;ll raise you mails that I get from Alibaba - after few months of receiving offers of aerospace-grade struts, I&#x27;m now getting mails advertising... stones.<p>(I do know how this happened though; the first is the result of me searching for aerospace-grade struts after CSR-7 launch failure, seeing if I can find the unnamed vendor by looking if someone is dumping cheap struts on Alibaba; the second is the result for me accidentally typing in &quot;Pebble&quot;, meaning Pebble Watch).