Inviting people is solving a symptom: lack of members currently. The disease is the lack of reasons for people to come to every run, which needs to be addressed... the root problem: getting people to come to pretty much every run that they're online for.
Lol, just said pretty much the same thing to Heie on the phone about 20 minutes ago. This problem isn't new. It has just been easier to see now that invitees have been closed.
I would rather see a "% attendance over the past X amount of time" system than a point system personally. Such that a new tier would be included ahead of the current tiers.
75%+ attendance> Wearable> 70+ > 60+ > 50+> 40+ > 1+ > Free
Cost point systems (DX) tend to result in accumulations of points which can actually encourage avoidance of runs which don't drop your AF. For example Person A has 60 points built up and the highest cost of a drop is 20 points, so Person A knows they don't need to attend to be able to lot.
Bidding point systems are very unforgiving for those who have a RL issue come up. Say Nekio and Chiiana are both after THF hands. Both attend all runs for 2 months and have 16 points built up. Nekio misses a run in the first week of the third month and thus has only 22 points versus Chiiana's 23 when THF hands drops on the last run of the third month. Under a bidding system only Chiiana would be lotting THF hands even though Nekio has 95% attendance.
A % attendance system refreshs and in so doing encourages steady attendance.