Yeah but think about it.
Buying games or renting them gives you a lower reward if you win the 100$ certificate, since you used money to get more points.
For an example, if you buy a game worth 10-20$, you lose that money so the reward in the end is not worth it...
Plus I wouldn't bother, its just 100$..
Its up to you though, if you can win 50-60$ and your sure of your shot, do it.
Don't do it though if your not sure, since you'll be stuck with old crappy games after that wasted your cash
