If some of you didn’t noticed, we had a big diminution of the community members count (60%). For 2 reasons:
- memberships expire, you have to renew it to stay in the community (see this subject)
- certifications expire too, you have to get new ones from other members to stay in the community
The latter point is what I want to underline: in ZB, certifications has a 1 month lifetime from their signature date, and you need a minimum quantity of certifications to stay in the community (3 exactly).
So, if no one certifies no one, community is condemned to collapse. 
Please try to certifiy others if you want a free currency to live!