It was sarcasm. I had hoped that including the bit about omaha would make it obvious. To be honest the motivator of the second option was:

"I have enough money that I can risk giving up a billion"

I had assumed everybody knew that Buffet had so much money. I did not understand how the commenter thought that this contest was going to be the way the world found out that Buffet was loaded.

he may be referring to dan gilbert...