It's impossible to make a living off a signature campaign. How are you even getting 800 USD from posting? With bitmixer (and we are both here) we can aim at 0.035 BTC weekly, if im not mistaken. So let's multiply that by 4, we get around 0.14 BTC per month, which means we are looking at 163 USD at current bitcoin price, which is awesome since I would be posting on forums anyway, but that's nothing in the developed world.
So unless you got a bunch of accounts, I don't see how you are making more (which is not permited as far as I know, and it would be a pain in the ass to post that much anyway, I would rater work in McDonalds and get more money)
True, I consider it more as treat money. If I find myself craving for stuff I shouldn't be eating while I'm at the mall, I don't feel so guilty anymore.

you are not supposed to make a living with signature campaigns. you can however make a decent amount of bitcoin if you have a high rank account and then use those funds as a startup. for example you can use it to start trading. give your exchange bitcoin address and get paid in your account there and then use it to multiply what you have earned to higher amounts and make a living that way if you are good at trading for example.
What I'm currently planning is buying an ice shaver and blender if I can find anything cheap. It's already hot here even if it's not summer. Maybe we'll have a refreshment stand beside the store. I operate in the gray economy anyway so I don't have to worry the gov't showing up to ask for some free cups
