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Yes, we have considered this at length, which is why we don't let anybody in the app without paying and so far the paywall has kept all the villains away.

Also, we don't verify anything so members can be as anonymous as they like and only reveal their identities to other members as they see fit.

Cool. Bitcoin makes everything better

Even here, you should pay to say something. This what got rid of spam

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Exactly, the idea of charging everybody to join OPA came from thinking about proof of work.

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How to do you manage the GPS Data? Is that app open source?

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We're not open source. The device's approximate geolocation is pulled once per app session.

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