getting at least one hit in all 50 states (called "50 State Bingo"). Another common bingo, called "FRB Bingo", occurs when a user gets hits on bills from all 12 Federal Reserve Banks. Most bills do not receive any responses, or hits, but many bills receive two or more hits. As of November 2020, the site recorded about 5,000 entries for found bills daily. The approximate hit rate is around 11.4%. Double- and triple-hitters are common, and bills with 4 or 5 hits are not unheard of. Almost daily, a bill receives its 6th hit. , the site record is held by a $1 bill with 18 entries. To increase the chance of having a bill reported, users (called "Georgers") may write or stamp text on the bills encouraging bill finders to visit www.wheresgeorge.com and track the bill's travels. Bills that are entered into the database, but not marked, are known as "naturals", "stealths", or "ghosts". If a bill entry violates the established rules of "natural circulation" (e.g. a user has found the same bill twice, a user has had more than 20 bills wind up with another user, etc.), it is flagged as an "alternate entry". If a user claims a "wild" (A bill found in circulation that has been marked or stamped with wheresgeorge.com as having already been entered on the site.), they are the submitters' "child". Controversy The site does not encourage the defacement of US currency. In October 1999, when interviewed for The New York Times, Eskin commented on why the Secret Service has not bothered the webmaster over possible defacement of US currency: "They've got better things to do. They want to catch counterfeiters counterfeiting billions of dollars." In April 2000, the site was investigated by the United States Secret Service, which informed Eskin that the selling of "Where's George?" rubber stamps on the web site is considered "advertising" on United States currency, which is illegal under . The site's administrators immediately ceased selling the rubber stamps; no further action against the site was taken. At least one spokesperson for the US Secret Service has pointed out in print that marking US bills, even if not defacement, can still be illegal if it falls under "advertisement". However, a Secret Service spokesman in Seattle, Washington, told The Seattle Times in 2004: "Quite frankly, we wouldn't spend too much looking into this." Where's George? and geocaching The