So moving to HTTPS lowered the average from ~1000ish to ~200 spam comments per month (I implemented HTTPS near the end of 2011-02).

And yay, for Akismet's graphs being back. For some reason they'd been broken for ages on this blog.

Not entirely sure why this keeps spambots away, but a drop from ~100 spam comments/day (1/2) to at most 4 seems pretty cool.

Edit: seems like they just do a POST request to an old URL (http://blog.tuinslak.org/some-post), which results in this reply:

HTTP/1.1 301 Moved Permanently
Server: nginx/0.9.4
Date: Tue, 22 Feb 2011 07:10:24 GMT
Content-Type: text/html
Content-Length: 184
Connection: close
Location: https://blog.tuinslak.org/

I’m guessing once they rescan the new URLs they’ll be spamming again. Just a matter of time for them to update their “bookmarks”. ;)

Anyway, here's the Akismet screenshot:

Pretty cool, no ?

Totals can be found here.