Ingress also had an invite-only launch, which meant that by the time lots of people got into the game, the portals were all super high level and playing the game was difficult.

Pokemon Go is already showing signs of the same problem at Gyms, where newer players are going to have to grind for days to take on a gym that their team doesn't already own.

It's too bad in a way, Pokemon Go is a way better idea, Ingress always felt like some cool ideas thrown together in search of a unifying theme. It is the only AR game with any real lasting appeal that I'm aware of, until perhaps Pokemon Go, but a lot of the choices made in building Ingress are less than ideal for Pokemon, and yet they form its foundation. I was never really clear what kept Niantic afloat, I always figured they were nothing more than a cost center at Google. Perhaps Pokemon will have enough success to prompt them to evolve the gameplay, and fix some of the common bugs with Ingress.