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.
I live in a 3rd world country with starving kids; my mental health is now net neutral for life so I'm good to go. I can easily post hundreds of times per day, I have lots of important world changing things to say. But I'm not sure where alts come into getting paid since they pay you in BTC and even .20 BTC per month is very little.
Maybe you're suggesting that I buy alts with my ill gotten gains. In North Korea, where I am now, they put you in jail for investing, reading a bible and of course, watching old Dallas/Dukes of Hazard episodes - so not sure that will work.
All of your assistance is very much appreciated in these difficult distressing times, my brothers in crypto.