I like your thinking......but the interest is being added to the prize pool.
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Harrahs are trying to create public profiles for the finalists; picture them appearing on chat tv shows around the world etc, to be followed by a"near" live broadcast of the final table in November - when ESPN has aired the other televised WSOP events and the several day lead up to the final table.
Sounds like the sort of thing APAT would do
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(and have done if you include the OnLive in Season One!).