I'd view extreme poverty as a problem for the state rather than advertisers, universal basic income (UBI) being one obvious approach, and access to information

I'd view extreme poverty as a problem for the state rather than advertisers, universal basic income (UBI) being one obvious approach, and access to information for those too poor to pay for it as a challenge that has been long addressed by public libraries. Solving these problems is neither an explicit goal of adverts nor something they achieve well as a side effect.