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.
Well, no one here will be able to see what will happen in 2100 or how many satoshi will be generated on blocks in 2100. There is no grantee that bitcoin will survive by that time and people may not have shifted to some other more better way for performing transactions. Also, even if the life exists after 2100, our life's will be end already.
why imagine too far? while we might have already died on that year or maybe Bitcoin has destroyed or died. yes, no one knows what will happen in 2100 unless you are truly still alive. we are still alive in 2020 and it is better to focus on what will happen in the following years.