We would like for our clan members to help out in the Citadel so that we can upgrade it and get more skill plots and keep improving on it each week, however resource gathering isn't mandatory.
Ranks are earnt by doing many things, including but not limited to helping out in the Citadel, participating in clan events and being a helpful member of the clan.
Begging for ranks is against the rules of the clan and will not help your chances in regards to ranking up.