Tons of dollars

Before I did that, I would correct the faulty grammar by inserting a definite article ("the") before the word Beiing, and the punctuation by inserting commas after "US" and "years".

NBC of the US, whose prime time rating has been pretty disappointing in recent years, {has raked in tons of dollars} by covering the Beijing 2008 Olympic Games.

Can you suggest another idiom expressing the same idea as that shown in the curly brackets?

NBC of the US, whose prime time rating has been pretty disappointing in recent years,

{has cashed in heavily}
{has made a pretty penny}
{has made a bundle}
{has made a killing}
{has hit pay dirt}
{has struck it rich}
{brough home the bacon}

by covering the Beijing 2008 Olympic Games.

These are just a few examples. You can find more by searching for money idioms with a search engine.