About user verification
I believe there must be a 2 groups of people that will verify each user.
One group of local users (15 or 30), so this might be family, friends, people that know each other in person.
The second group of random users (15 or 30) to verify each user to prevent any coordinated group activity inflating the network with fake users.
More counter fraud measure can be taken. For example each user can be suspended by other users, if a certain amount of valid users confirm a possible fraud, so it would require to be verified for one more time with strict rules.
