The game exchange where you can buy items to progress the game faster, such as:

https://lh6.googleusercontent.com/HRJ9LNL5iSxnBhZH6f8twC6qxDX3-Q1xiKbfcDciVRFI94_Ha2YSMnFKCykx7-uzfk1udSh7GcKmJaWhnmFYxR6nl81azQD8txi_u35YDK6d2K9eat2SU8mua2YEAWHx3tFwERzjP4fVq2DusA=s0