Around 3 hours per day because I sometimes also join the social media campaign. However, mainly, Signature campaign is my first choice and I don't need much time for this task. Approximately it will be no more than 1 hour. But for the other campaign, it may spend more hours. Yes, bounty is very promising and worthy to do if we can select the best bounty with great reward. The reward is not sure depending on the tokens that we earn.