On mining pools all miners get rewarded with the analogous CPU they have used.
I don't know exactly how many satoshis will be generated on every block after 2100 but I know they will be very few. Imagine splitting 1 satoshi. How? Will the bitcoin community create the nakamotos?
1 satoshi = 1000 nakamotos for example. Too dumb question, tho, since we can't know a damn thing about that era. Some say that life will end after 2100 due to loss of natural supplies.
You don't have to wait for 2100 to see what will happen to miners or mining pool.
Just imagine this, 88% of Bitcoin has been mined already, and there's around 2.5
BTC left to be mined. So in the next three halvings, by 2032 "almost" all Bitcoin so we will see by that time what will be the status or the economics of bitcoin mining.