I've seen some high GOO totals, but this is ridiculous...

What is the point of hacking the game to get more goo? If you have the means to hacking, you might as well go for donuts to buy all halloween prices. It makes no sense to go past 10 k goo if you are a hacker.
Clearly this person is exploiting a glitch in order to get more donuts, hence the high goo count. I doubt he/she hacked the game.