Each different currency has it's own hash rate, it's own difficulty, value, etc etc, JUST like bitcoin.
When you signed up, IF you put in an address for these different currencies, you will be mining them along with your bitcoin.
If you did not put in an address then you will NOT be mining them.
Can you elaborate on what it means to mine them
along with my bitcoins.
What was suggested here (and I am not sure if it is correct) that the same computation can be used for both mining bitcoins and other cryptocurrencies. In other words, that by putting addresses for more than one currency, I will not lose some of my computational capacity to mining things other than bitcoins.
If so, then for 1 share that I submit, I am to receive both 1 unit of reward for bitcoin mining, but also 1 unit of reward for each of the other coins.
Is this how it works?
If not, then now it works exactly in terms of rewards?