I know that there are other members here working day and night doing bounty campaigns. But i think that doing bounty campaigns is not worth it especially if you had a lot of work during the day. Some are just boasting on their bounty campaign earning wherein fact maybe because they are lucky to receive those awards but somehow do not wish that you could be like them because some of the ICO project that you will going to work will not give bounty rewards and some of it will fail, or just pause. So no reason for sleeping late at night.
Of course as the main income, I would not now rely , and as an additional income I think you can count , there are project which give 2-3 Ethereum now , just expect more of course