Link or it didn't happen.
10GB? Online Gaming? That honestly depends on the game, console updates, etc. Honestly I burn through about 5GB a month in just gaming (without downloading DLCs or anything). It just depends on your usage. Some games send more packets, larger packets. Xbox live sends a HUGE amount of packets. This also isn't including voice communications, which will leach your limit as well. You might want to invest in upgrading your limit.