Surely if they have income from "12 other sources", then they don't need to do Youtube and are just being greedy. I guess they have to feed Priss and her 10 stomachs somehow. We know they are greedy with food, and now we know they are definitely greedy with money. They are also lazy pigs who don't want to work a real job, so stay at home all day slobbing around with a camera, eating and editing videos. I hope as Isaiah gets older, he sees his parents for what they really are and starts to distance himself from them. I can't wait until he goes to college.
As for the 12 income sources, that probably includes their paid sponsors (Dunkin), their paetreon, their online stores etc. They have no shame, I just hope their fans wake the duck up.
IF they aren't sponsored by Dunkin, they probably just get free coffee/donuts from them in exchange for free advertising. Don't forget, they always have their meet-ups in Dunkin- they are definitely getting something from them.