If you look at
this source for example (I am not sure if it's reliable and accurate), and scroll all the way down where it shows several African nations, you would notice that the average monthly income for some of them is between $26 and $100. If a user from those countries managed to get into a signature campaign that paid only $40-$50 weekly, they would be able to lead a more than comfortable life. If they managed to remain part of the campaign for a longer period of course.
I know people in the Philippines who make $80 a month for a full-time job. So even $40 a week would be a significant improvement. Not just because it would represent a 100% raise, but also because they would have a lot more free time to pursue other income...
Income is especially scarce in many parts of the world right now.
Regardless, if they are cheaters or not contributing anything of value, they've got to go. This shouldn't be a place where people float by writing swaths of nothing that technically don't break the rules.