I previously considered tracking IP addresses in turn for giving ad-revenue back to the community, however due to negative response, if the app were to be monetized in a way that also gives back to the active users I would need an alternative way to stop bots & cheaters that are inherent to anything with real currency value without using any personal data.
UPDATE:
I will avoid all IP tracking and be completely transparent about that. However, if it is desired to give back to the active users, I will need an alternative to stop the bots & cheaters, they are inherent to anything that Involves real currency value.
Also regardless to the comments below, there is a login as guest option that uses no personal data