With Atomica, there appears to be one working who has 248Kh/s, which is too slow to get any coins.
With a total network of 7.372 GH/s, your miner (300Mh/s would not get many blocks, perhaps 1 of 25 if mining solo or on Atomica where you would be the only one mining. That would be about 1 block per hour, assuming everything is working right. How long did you try to mine? Having shares accepted only results in payout if the mining pool is successful in mining a block.
For hash-to-coins, I have no experience, so cannot comment on why your miners do not connect with cgminer.