I am the challenger to Escola Pla de Girona, DIA, etc.
My experience with FOAM so far:
I heard about the project on the Epicenter podcast. Found no POI’s in my area. Added a personally very important one, the Institute for Advanced Study.
Got curious about the incentive system, found there is no incentive to create a new POI. Strange design choice, but okay.
It turns out the main incentive is to challenge. That makes sense if you want to prioritize quality over quantity. But blockchain is immutable, so the only way to improve an existing POI is to challenge and replace it.
The community has apparently been burned in the past by false promises to replace. Luckily, there is a fix: Challengers can create a duplicate POI with the missing/corrected information before challenging.
Then clearly, one of the two duplicates should be challenged. The original POI has less information, so the map would benefit by challenging the original and letting the new, improved, POI stand.
Nevertheless, the system overall seems unfair to cartographers. The challenger who provides a small improvement should get a proportionately small reward. But why should the initial cartographer, who provided most of the valuable content, lose her entire stake?
I’d be curious to hear from the designers of the incentive system, is the current map the outcome you hoped for? Is it functioning as you expected?