Good initiative. I also think you should do % of ALL coins.
This also brings up the point that the social consensus is ambiguous? For a coin with infinite supply it is impossible to determine the %.
I'd settle for 10% of infinity!
In all seriousness, one interpretation is that for permanently inflationary coins, devs should give a fixed fraction of each mining block reward to PTS/AGS holders. That would certainly honor the social consensus. Miners might not appreciate it, but a clever-enough developer should be able to convince them to get on board.