The website you have just visited is ACAP-enabled.
ACAP (Automated Content Access Protocol) is the new open standard that enables website owners to express terms under which crawlers (also known as robots or spiders) and others are allowed access to and use of their website contents. ACAP has been devised by publishers in collaboration with search engine operators and other web content aggregators to revolutionise the creation, dissemination, use, and protection of copyright-protected content on the worldwide web.
ACAP is set to become a universal permissions protocol on the Internet, a totally open, non-proprietary standard. Protect your content.