But we should also have a room to consider those persons that are new to the community/newbie's. I think the Leo team will be checking their reputation before carrying our some actions. I don't see the reason why you will be on Leo for more than 3 months and you are not on premium. That fully shows that you are not in support to the growth of the community, so some activities like curation should not go to such individual.
The premium account should be curated more regular even if it's only thread's that they do, but as long as they are premium holder, they need to be curated more regular. So that it may encourage them to sustain their premium state and to engage more.