Traffic on PokerStars, the largest online poker site in the world, has slipped 9% in the last two weeks, likely due to potential cashout issues for its players, according to PokerScout.com. PokerStars has recommended bank wires for players seeking cashouts.

On the first Thursday of June (the 4th), PokerStars saw a peak of 37,523 real money ring game players. By June 11th, one week later, that number had dropped to 34,692, a fall of 8%. Yesterday (June 18th), the site hosted a peak of 34,207 cash game players, representing a 1% decline week over week and 9% drop since June 4th. As further evidence of a slowdown, on June 13th, PokerStars recorded a peak player count of 28,455, the first time it had slumped below 30,000 since December 31st, 2008.

However, traffic on the site is up during the first 18 days of June in comparison to the same period in May despite the ongoing World Series of Poker (WSOP). During the first 18 days of May, PokerStars boasted an average peak player count of 34,626 at its virtual cash game felts. In the same period this month, it has seen an average of 34,872, a boost of nearly 1%. Throughout the month of May, PokerStars had an average peak volume of 34,886 players. An article released by PokerScout on June 14th noted that traffic on Stars had fallen 5% in the last week alone to the ?lowest level so far this year.? Year over year, however, the world?s most popular online poker site has experienced a 54% growth in activity.

On Full Tilt Poker, the average peak player volume over the first 18 days of May stood at 16,801. In June, that figure has ballooned to 17,736, a growth of nearly 6%. During the same period when traffic on PokerStars fell by 9%, player counts on Full Tilt grew by 2%. The site will bring back its Sit & Go Madness promotion this weekend, offering nearly $200,000 for players competing in the popular single-table tournaments. Between April 19th and May 10th, the peak number of cash game players on Full Tilt Poker exceeded 18,000 just once. During the first 18 days of June, the 18,000 plateau has been breached eight times, including four straight days between June 15th and June 18th. Year over year traffic at Full Tilt Poker is up by 59%.

At the CEREUS Network, which includes Absolute Poker and Ultimate Bet, cash game traffic has remained steady. During the first 18 days of May, an average peak of 3,144 real money ring game players could be found on the CEREUS Network. Over the same period in June, that number grew slightly to 3,148. Over the last 30 days, the Network has hosted fewer than 3,000 real money ring game players just five times and has not attracted a peak of fewer than 2,000 since April 30th. According to PokerScout, CEREUS is the fifth largest Network worldwide with a seven day running average of 2,300 real money ring game players.

Finally, traffic on PartyPoker, which does not accept players from the United States, is up significantly. PokerScout.com claims the spike in player volume by the longtime industry staple may be due to the Million Dollar Hand promotion. During the first 18 days of May, the average peak cash game traffic was 7,351 players. During the same period in June, the figure skyrocketed to 9,410, a jump of 28%.

Interactive Media Entertainment and Gaming Association (iMEGA) Executive Director Joe Brennan gave Poker News Daily his reaction to the drop in traffic on PokerStars: ?Operators know the burden is on them to make sure the players have the money due them. Any operator that would have problems would likely lose share to companies that don’t. But, it’s too early to say any one company is having major problems and no reason to think that all of the operators who have been affected aren’t working overtime to resolve slow pay problems. There is no need to panic.? iMEGA has not yet become involved in the situation legally. So far, it has allowed the Poker Players Alliance (PPA), the main lobbying force for the poker industry, to take the lead.