That's a great question from my experience you're getting paid a spacific US dollar amount daily no matter what coin you mine And every coin has a different value so you would get a different amount of each coin you mine. So if I mine doge coin which is about a penny I would get thousands of doge coin but if I mine bitcoin I will get a fraction of 1 bitcoin. But as you hold those coins you mine the value of them can go up or down. Hope this helps