Today I noticed the Android version asked for permission for in-app purchases. Niantic Labs, which used to be part of Google, is doing some interesting things such as teaming up with Pokemon to produce a similar game (I assume it will require players to walk/bike/move around to physical sites to catch Pokemons). Pokemon will have a pay-for element, and as many have anticipated, it seems Ingress will too.
I've seen concerns on the internet about this, but I trust that Niantic will do this well, and it won't be a "pay to win" type of game. The other difficult balance will be between people at higher levels already as compared with those new to the game who might have to pay to level up at the same speed as the longer term players.
Anyway, if you need some encouragement to get walking and see the world, I'd recommend Ingress, whether or you not you're interested in the social aspects of it!