Gamification and invitations

[sam (Sam Saffron)]

@RGJ

While debugging this, I also found that the score job will only consider invites that are less than 10 days old. So if an invite is redeemed after 11 days, no points will be awarded at all. I was going to say 'I guess it needs to look at updated_at instead of created_at but when the redemption count for the invite is increased, the updated_at timestamp is not being touched

This feels like a different feature request vs bug. (cc @Falco )