Apparently pg has been rolling out new features, mostly to combat "abusive crawlers": https://news.ycombinator.com/item?id=5315252<p>HN is a pretty popular site, and probably has high costs for hosting. I wonder if deployment of new spam-detection features is related to this.<p>I have no problem donating some amount to help offset that cost as I really like HN. Put up a donation page and I'll go.