I like your thinking......but the interest is being added to the prize pool.
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
(and have done if you include the OnLive in Season One!).