Unless the game's popularity dies down considerably (which it most likely will but we'll have to see, Pokemon is a strong IP after all), that probably wouldn't

Unless the game's popularity dies down considerably (which it most likely will but we'll have to see, Pokemon is a strong IP after all), that probably wouldn't be sustainable. Every shop that could afford it would have one which would have unwanted effects on both game balance and small businesses (Oh, you just opened up a cafe? Good luck competing against all the ones that already have Pokestops on them). The disparity between urban/high-income areas and rural/low-income areas is a shame but not surprising. Niantic pulled their location data from Ingress which has a, from what I've seen, generally urban, mid to high income, tech savy playerbase. Crowd-sourced submissions reflect that, as well as the fact that they used cellular activity.