From the My Challenge screen (see image below)...
...just click into your Challenge (the large icon in the middle of the screen), and then click on the small "Active" Challenge icon in the bottom left corner (see image below).
You will then see in the bottom left corner the 'Rules, Prizes & Privacy' button (see image below). Click it!
There you'll see four tabs at the top:
Prizes / Rules / Game Play / Privacy
Just click on the Rules tab
to find the details about prizing
such as when prizes are sent, how and more!
For questions about prizing, you can also email us.