GAS and RAM are required when staking, unstaking, and receiving staking rewards.
GAS can be obtained by pledgeing IOST and RAM must be purchased by IOST. GAS limit can be increased by pledging for other accounts and RAM can also be purchsed for other accounts.
The staking rewards are paid out daily.
If you wish to redeem your votes (unstaking), it takes 3 days. After redemption, you can vote again, trade or withdraw. Note that the distribution of rewards will stop once you initiate the vote redemption process.