Are you saying that at this point in time upvoters are depleting the rewards pool every single day?
I haven't actually looked into it myself, but I would imagine there's just no way. If the rewards pool is being depleted every day then that means back when STEEM was $7+ and peoples upvotes were heavier (my heaviest upvote was 0.12 and is now back to 0.03) then that means that the rewards pool was definitely being depleted daily back then and the whole system is majorly flawed and cannot possibly accept growth if the rewards pool is being depleted every day.
Assuming there's 40k+ steem being rewarded daily and assuming that every steem rewarded went to awesome content creators, and our population of great content creators were to double due to community growth then those guys would not get anything because the rewards pool is already being consumed in full by the early adopters.