I don't think anyone actually cares about this in principle. This is more of a product and marketing problem than a legal or moral one.

What people dislike is noticing the strings attached so distastefully. I can't think of any fads or pastimes where there aren't any, but the benefits of the activity offered should outweigh the cost.

In that sense, Pokémon Go was a bad deal. I still don't get what was ever in it for the player.