Dan making a mature decision here, more mature than many of his age and race would I imagine.
Took me a while to get the pokemon reference, considering some of the real world misuses of Pokemon Go, I can imagine creatures luring Being out to the middle of nowhere with it.
Took me a second to get it too, because they're called PokéStops in the actual game!
So it seems in this universe, there both was a Poké-craze where Pokémon actually existed, and Pokémon Go, which, as we see, does not actually use real Pokémon. Granted, the Poké-craze is from very early strips that could easily have been retconned away, but I prefer to keep the headcanon that after the Poké-craze went away (for most people (http://www.missmab.com/Comics/Vol_1812.php)), Pokémon Go was created for those who wanted to continue the experience despite the actual Pokémon being gone.