I cannot see how even whales can have viewed every post

Most whales have auto-voting bots. I used to think this was a negative, until I realized how impossible it would be to keep up with hundreds of replies. Also, whales are known to have other projects going on behind the scenes; and, depending on, have very little time to actually read posts. What they end up doing is selecting 'reliable' authors who put out pretty decent work; and, set their upvote at a percentage, letting the bots do most of the work. This makes a lot of sense. They use their voting power; but, in many cases have the external tool to do so for them.

allow visitors access to only last six days,

I like this idea, also. I primarily created this suggestion to call attention to the need for a solution to this obvious dilemma.

Best regards!

Peace.