I think one of the reasons why Go has become more explicitly pay-to-play in the past few years is that these opportunities are drying up. There's not enough If It's Free You're The Product chances so now everything (Dynamax raids, Super Mega Raids, etc.) is just another thing you have to pay for.
This might be one of the most insane scandals in game history
When Pokemon Go players scan PokeStops, theyve been unknowingly building a detailed visual model of the world which is being sold to a military contractor to build a no-GPS positioning for the new generation of unmanned killing machines