The introduction of the Club Champion "contributions" addition has introduced a difficulty in determining who is and who is not active in a club. I suggest the contribution piggy bank can be used to aid club owners and show members who is and isn't active in the club on a 30-60-90+ day level like this:
In the picture above I changed the color of the club piggy bank using blue for members inactive for 31-60 days and purple for members inactive in the club for 61 days and above.
Obviously the color choice and time frame between changes are arbitrary, but this is my basic idea/suggestion to help club owners and players determine activity which helps with membership management.