Perhaps when a user tips, the message on the group should also indicate the tipper's current "tip karma" level
- 0.000001 osmo = 1 karma, or something like that
- tip karma could be per group, or globally
- a group admin can run competitions to award a prize to the person with the highest karma in the week
Perhaps when a user tips, the message on the group should also indicate the tipper's current "tip karma" level