Blackcoin has been running a 'fixed' POS block reward of 1.5 coins for a while.   The original protocol used a 1% inflation (new coins) generated each year.  I made a post about this back in 2015; regarding how having a fixed block reward is notably different from a true 1% annual increase to the total number of coins.


https://bitcointalk.org/index.php?topic=469640.msg12860963#msg12860963


Has there been consideration to make the block-reward dynamic based on the total supply of coins?