Log Flume doesn't copy any spells or abilities that target a creature in a log
The reverse -1/-1 counter decks also thrive off proliferation
Suffice to say, decks play these lands without downside most of the time, and they shine in 1- or 2-color decks
You can find similar abilities on tons of cards, from Young Pyromancer and Talrand, Sky Summoner to Deekah, Fractal Theorist and Poppet Stitcher
This can be respected but while it's a repeatable, strong piece of removal, it doesn't merit a first place in the rankings strictly because bounce effects don't lend themselves well towards opposing creatures with enter-the-battlefield effects, of which there are always a lot in every set
The system, overall, is now more useful as a tool for tailoring your games