Full Tilt Poker, one of the largest online poker sites still serving the US, was accused in a lawsuit on Thursday of being controlled from within the country, raising questions about the effectiveness of a 2006 ban on US internet gambling.

More broadly, the suit – which was filed by Lary Kennedy, a poker player and user of Full Tilt’s service – draws attention to the immense variety of strategies being used as companies jockey for position in the event that online card games or sports betting will be legalised. Bills are currently pending in Congress.