It's the exact opposite. Advertising-based model is why the poorest people in the poorest countries in the world have had access to the exact same Google search, YouTube and Facebook as the richest people in the US. Ad-supported business models are the great equalizers of wealth.
Considering how prominent gambling and gambling advertising is, aren't we creating more poverty and keeping people poor through ads? Advertising seems like it's a net drain on the poor through encouraging consumption people can't afford and pushing a variety of vices.
Edit: "Sorry your husband lost the money you were saving for a house on stake.com, but here's your free Google search."