user1498: https://ambcrypto.com/mining-in-the-bear-market-made-easy-fast-and-cheap-with-minergate/
This one claims they can mine more efficiently by mining several coins at once.
I have a hard time believing that any pool can outperform "normal" pool.
What's the story.
Is this possible? Is this guy legit?
Let's for simplicity sake we got to pick numbers from 0 to 7. Say the hashing function is add 5 modulo 8. Of course the "right" nonce is 3. That's because 3+5 is 0 module 8.
Say the hash/signature or whatever of the transaction is 1. Mining is finding an extra nonce, if added to 1, would hash to 0 (or below difficulty). Something like that right. We try and found that the extra nonce is 2.
Say we have 2 coins. Say the starting nonce is 1 and 2 respectively. I wonder if it's possible to to add extra nonce to 1, then try to find an extra nonce where the hash is 0. Turns out if we add 1 to the extra nonce, we got the right answer.
We just add all the extra nonce and got the nonce that hash to the right number for 2 coins. 
Is that possible?
My understanding of how mining works is quite a bit shaky here.
Is my understanding correct?
Is miner gate offering merge mining for coins that do not support it?

user90088: You can possible optimize revenue by switching to mining another coin dynamically, but it isn’t possible to mine two different coins in a given grind attempt.
The exception are chains which are merge-mined. Each merge-mined chain block is committed to a block of a main-chain block, a Bitcoin block for example. Validators of the merge-mined coin can validate POW of the main-chain (eg Bitcoin) and enforce separate consensus rules.
The difficulty of a merge-mined coin can be equal or higher than that of the main chain.
Therefore, if there is any significant value in the merge mined coin, a Bitcoin miner would be incentivized to include valid block commitments in each Bitcoin block it attempts to mine.

1498: <p><a href="https://ambcrypto.com/mining-in-the-bear-market-made-easy-fast-and-cheap-with-minergate/" rel="nofollow noreferrer">https://ambcrypto.com/mining-in-the-bear-market-made-easy-fast-and-cheap-with-minergate/</a></p>

<p>This one claims they can mine more efficiently by mining several coins at once.</p>

<p>I have a hard time believing that any pool can outperform "normal" pool.</p>

<p>What's the story.</p>

<p>Is this possible? Is this guy legit?</p>

<p>Let's for simplicity sake we got to pick numbers from 0 to 7. Say the hashing function is add 5 modulo 8. Of course the "right" nonce is 3. That's because 3+5 is 0 module 8.</p>

<p>Say the hash/signature or whatever of the transaction is 1. Mining is finding an extra nonce, if added to 1, would hash to 0 (or below difficulty). Something like that right. We try and found that the extra nonce is 2.</p>

<p>Say we have 2 coins. Say the starting nonce is 1 and 2 respectively. I wonder if it's possible to to add extra nonce to 1, then try to find an extra nonce where the hash is 0. Turns out if we add 1 to the extra nonce, we got the right answer.</p>

<p>We just add all the extra nonce and got the nonce that hash to the right number for 2 coins. </p>

<p>Is that possible?</p>

<p>My understanding of how mining works is quite a bit shaky here.</p>

<p>Is my understanding correct?</p>

<p>Is miner gate offering merge mining for coins that do not support it?</p>
 90088: <p>You can possible optimize revenue by switching to mining another coin dynamically, but it isn’t possible to mine two different coins in a given grind attempt.</p>

<p>The exception are chains which are merge-mined. Each merge-mined chain block is committed to a block of a main-chain block, a Bitcoin block for example. Validators of the merge-mined coin can validate POW of the main-chain (eg Bitcoin) and enforce separate consensus rules.</p>

<p>The difficulty of a merge-mined coin can be equal or higher than that of the main chain.</p>

<p>Therefore, if there is any significant value in the merge mined coin, a Bitcoin miner would be incentivized to include valid block commitments in each Bitcoin block it attempts to mine.</p>
