Think of it more as spaced repetitive learning for the HN crowd.

I rremembered what Kelly Criterion was, that it was an ideal betting method, but could not remember the formula. Now I might remember both the next time it comes up. And maybe use it in my life!

Ie should I play the lottery?

1/45m - (1-1/45m)/1M

0.00000002 - 0.000001

-0.00000098

so, no.

Not really. I do it because a lot of readers like looking at past threads and because I think it's good to reflect the community accurately to itself—in this case, to point out how rich the archives are.

Trying to avoid site amnesia, like Reddit has, I assume.