To stake your OFE tokens, you must transfer 10% of your token holdings (as a fee) to the #adVentureStaking wallet: erd1yex8vk05jepft3jfdgppryt5kd9vwqsstrc5dujx49zzuxxxxxxs4yh6uk
The rest of the tokens can be used during the month.
You just need to have the staked tokens at the end of the month in your wallet to get the reward.