‘Game of Thrones’ Will Shoot Multiple Endings to Prevent Spoilers

According to Wikipedia[1], in season 6 every episode cost an average of $10 million - lets say they're shooting 2 alternative endings for a cost of $20 million.

For the same $20 million per year they could hire a team of 100-200 security engineers (realistically couldn't even use that many effectively) and still have enough left over for some snake-oil vendor trash products.

Instead they do this. If they get hacked again what's to stop the hacker from leaking all 3 endings?

[1]: https://en.wikipedia.org/wiki/Game_of_Thrones#Conception_and...