In a way related to CC, pay attention to individual unspent inputs! Lowest PoS reward seems to be 0.05 YAC and, based on already mined PoS blocks, it seems minimum amount input should hold to make sure at least 0.05 YAC will be staked later is around 10 YAC. There were few inputs bellow 10 YAC that got PoS reward (0.05 YAC or slightly more) but generaly speaking if you want PoS coins you should gather coins on 10+ YAC piles. Use CC to select small unspent inputs (like 1 or 0.025 YAC) and send them to one of your addresses in such a way that transaction amount is 10 or more YAC.
Put differently, all those individual 1 YAC or similary small payouts you received will never ever return any PoS rewards! If you are holding other PoS altcoins than you should check already mined PoS blocks there. The worst case seems to be BTB, where very few people actualy got PoS rewards. Bellow is data for 3 latest BTB PoS blocks at time of this post, notice that in all 3 cases PoS reward is 0 coins.