What do you DO with all that carp?

I'm not a carp fisherman, but its interesting to watch an entire industry
springing up. In advertisements for carp lakes, I see pictures of these guys
with these giant nets, filled with carp. Many of them look like they have
two or three dozen fish or more, with a total weight into the hundreds of
pounds.

My question, being primarily a C&R fisherman, is what do you DO with all
that fish?? It seems like (and I know I could be wrong here) that the
purpose of the net is to be able to brag to other carp fishermen about what
a huge pile of fish you caught, but I cannot imagine someone EATING that
much fish. And some of them (the really big ones) are pretty old: I also
cant imagine the carp lake having too many of those monsters.

So what do you do with all the fish? Sell it to a catfood company? Toss it
in the woods? Eat it? Sell it to a fish mongerer? This is all entirely
foreign to me....

TIA

--riverman