If you look at the confirmed vs latest block you see that the time diff is ~6 hours. So first 6 hours you get nothing as the blocks mature. Payout per block is ca 17 (was yesterday, might be lower today already). So take your relative hashrate (pool was about 100MH overnight) so your share would be 0.004*17 per block once payouts reached your contribution and as it's PPLNS the first few blocks it would be smaller for you. So 0.7 YAC for 9h is not far off. You'll get plenty of YAC from shares still not mature.

For me the pool paid overnight 577 YAC and got some 40 more on pool (I have payout at 50). So it's paying and it's paying very well.