I'm not trying to take away from the thrust of your point. But pragmatically it seems like it could be in the scope of libraries to maintain some $4/mo prepaid

I'm not trying to take away from the thrust of your point. But pragmatically it seems like it could be in the scope of libraries to maintain some $4/mo prepaid SIMs to facilitate people signing up for new online accounts. Win-win for serving both the poor and people who care about privacy.