Southperry Logo Contest Voting!

On the contrary. Extractors aren't a particularly big thing in MS. In fact, I suspect most players wouldn't recognize one if they saw it. You're also right that we never mention them on SP.
However, Extractions are very central to SP. Unlike feathers which have nothing but tradition to tie them to the site.

I find #4 quite brilliant in both idea and execution. I like how it seems to retain all the fine details even at 16x16 (as opposed to #1 which becomes meaningless), and I understand that since the Maple Leaf being extracted has to be red, the rest of the color scheme is pretty much derived from that.

If it were to be altered a little though, it could be great! (and I think, quite fitting personally)