I know that the vegas casinos do it, i just wonder if any off-shore sportsbooks would extend any sizeable credit to a "whale" type of player. I would think it would be risky, but it may be a move that helps sportsbooks retain a great player. I think if i were a book, and had a huge player that has lost tons over the years that I may extend hin credit. I wonder what sportsbooks would do in this situation.