PokerTableRatings (PTR), the controversial yet popular poker tracking web site, is currently under a large DDoS (Distributed Denial of Service) attack. The attack that started two days ago is causing users to experience delays in service and in some instances features of the site may not be available.
PTR collects data on hands played across a number of poker sites and networks then sells that information to players. The site operates outside the Terms and Conditions of most of the sites it tracks but it has been instrumental in uncovering bot rings, collusion, and security issues on the sites it tracks.