It shouldn't be an edited image. The user has posted the winning seeds as well.
Anyways, even if that's an edited image and the user has changed the seeds to cheat freebitco, the game is still provably fair.

There is no doubt that you always have the chance of rolling the number 10000 and win the biggest prize.
If you have any doubt on the fairness of the game, I recommend you to click on "This game is provably fair" button and read the details on how the rolls number are calculated.