@j12t I strongly oppose that assumption about pocket cash.
$1 per month is out of pocket cash for even the poorest of the poor, if they get a value out of it that is more than what they put into. Note that you are addressing people with a smartphone and internet as customers, they have money, and they want to spend it wisely for their own profit.
The poor are to be taken seriously as customers.
What value can a social network offer someone with only limited cash? This you can find out by proper "Customer Development" as defined by Steve Blank.
Talk to them before you make assumptions.
Having a product so bad that people don't want to spend 1$/month is a sign of a strong need to work on the value proposition, sales, marketing, and invest into product management.
There is a lack of entrepreneurs focussing on making products for the poorest of the poor by talking to them, says
https://en.m.wikipedia.org/wiki/The_Fortune_at_the_Bottom_of_the_Pyramid?utm_source=chatgpt.com
And
https://m.youtube.com/watch?v=Qqh8r3Z1e8I
Cross-financing as you propose leads to #patronizing .