There are two ways of getting oCoins in Octavo.
The first one is purchasing them. Octavo oCoins come in bundles. The more you buy, the more free oCoins you will get.
Another way of getting oCoins, is by inviting users to Octavo. Once your friend accepts your invitation and signs-up in Octavo, you will get automatically 200 oCoins and receive a notification.
To buy a bundle and invite your friends to Octavo, access "My oCoins" section from the main side menu.
Bundles are available to purchase under "My oCoins" after adding one credit/debit card to your profile.