It's better if the Renovato project's bounty has payment structure per week.
Participants should be paid for their works per week.
It's long lasting campaign, so what happen for participants if eventually the Renovato won't pay them.
Additionally, the team should use Escrow service for the fund used to pay bounties.
Yes once a week it would be as correct as possible. I myself am going to take part in the bounty program as I find this project worthwhile.