Thanks Tytanick for considering to add ZGG.

For Claymore, ESM (Ethereum Stratum Mode)=3 is the correct one to use for NH but this setting is required in ETH miner - not sure if this is applicable to XMR or ZEC.

Many of the Monero pools are getting more and more "unpredictable" in the way payouts are sent and calculations of actual hash at poolside.

At NH, it uses straight PPS and pays in BTC - meaning NH will take the risk and pays miners upfront for every shares submitted.

Sure NH is a bit higher on their charges but I think it evens out because:

1. Paid upfront - PPS reward system
2. Automatic payments in Bitcoins up to 4 times a day
3. Transparency - I know how many BTC will I received at what date and time.
4. No need to wait for unexchanged coins - you are paid in Bitcoins for every submitted share (avoid exchange charges for converting and transfer of BTC to your own wallet).

In conclusion, NH rental mining is a good alternative when profitability of coins is not attractive.

I think smOS will have more plus than minus, for having a complete list of miners and ability to mine on every known pure mining pools, and also rental mining like NH.