when we recieve our rewards?
The reward will be distributed every week, Saturday. The first distribution was performed on April 15 so if you join the bounties before that day, suppose to be the reward has been already sent to your address.
I think you misunderstood what he wants to ask. The "Reward" he is asking based on my understanding is the payment. If so, the payment will be after the ICO is finished. That would be 5% of the total funds raised. Out of that 5%, 50% of the distribution will be on the Signature Campaign and the payment will depend on how many stakes you have.
The reward you mentioned is "Stake". That was distributed every week if and only if you joined before the distribution and you reach the minimum post. It will be listed in the spreadsheet and not yet sent to your address.