How is it not possible to buy a single meal from earnings from signature campaign? Off course you can buy it, but you cannot depend only on signature campaign for living.
Don't know about where you live but at some places, a single meal is worth 5$ and you can only earn ~3$ a day max in signature campaign. (Full member rate)
Given 3rd world peasants make like $100 per month that's not saying much, mate. I'm in North Korea so I can feed my 8 kids off that but I wanna make some real scratch (>$1,000/ month] off this gig so I can do my own Korxit, if I give up all my posting talents. So what's the highest paying sig campaign? Thx.
An average signature campaign pays 0.03 BTC per week (for full members). If you have tons of alts then you can make that >1,000$ per month. I don't recommend it though because for me it's unhealthy for the mind. Imagine yourself posting hundreds of times a day. But since that you mentioned you have 8 kids, then you really have to work hard at something.