I research on many ICOs before decide on doing their bounty campaigns, and usually I spend about 2 to 3 hours a day all depend on the number of campaigns I have. I just finished one doing blogs earning about US$ 1500. and this is very good reward for writing 4 blogs. I like doing bounty campaigns as putting much effort to research will have good chance of landing good paying ICOs. I am working hard to get better ranking so that I could get better rewards for my work.