Regarding the CPU, when creating an instance you can see this: "G2 instances are backed by 1 x NVDIA GRID GPU (Kepler GK104) and 8 x hardware hyperthreads form an Intel Xeon E5-2670". According to [Intel's product page](http://ark.intel.com/products/64595), the processor only has 16 hyperthreads, so 2 users per CPU. My reasoning may be wrong though, I'm not a virtualization expert at all.
Regarding the CPU, when creating an instance you can see this: "G2 instances are backed by 1 x NVDIA GRID GPU (Kepler GK104) and 8 x hardware hyperthreads form an Intel Xeon E5-2670". According to [Intel's product page](http://ark.intel.com/products/64595), the processor only has 16 hyperthreads, so 2 users per CPU. My reasoning may be wrong though, I'm not a virtualization expert at all.