You can convert Coins earned through viewing posts or referring new members into cash. To initiate this conversion, go to the "Wallet" section in the main menu and click on the yellow Exchange Icon next to your displayed Coin balance. The converted Coins will be added to your cash balance.
The current exchange rate for converting Coins into cash is displayed on the conversion page.
The cash balance is automatically paid out to the account set on the Settings page at the beginning of the following month (provided the minimum withdrawal amount is reached).
Learn more in the article Conversion of Coins to Cash.