Vert relevant: <a href="http:&#x2F;&#x2F;yosefk.com&#x2F;blog&#x2F;10x-more-selective.html" rel="nofollow">http:&#x2F;&#x2F;yosefk.com&#x2F;blog&#x2F;10x-more-selective.html</a> ( and the not-so-long HN discussion <a href="https:&#x2F;&#x2F;news.ycombinator.com&#x2F;item?id=5577722" rel="nofollow">https:&#x2F;&#x2F;news.ycombinator.com&#x2F;item?id=5577722</a> )