Okay. It seems that if I enable the typo feature (which is disabled by default, I've just checked in a clean profile) and go to amazon.comm, I get redirected to http://amazon.com/?tag=uf024-20
ABP notifies me of the redirection, and I can accept or blacklist it.
However it appears to add that tag only if I typo the name, if I follow a good Amazon link (with or without the affiliate) then it doesn't get 'corrected'.
Although since the rewrite rules are downloaded from a remote location (over HTTP, not even HTTPS!) they could in theory decide to rewrite any links in the future, without many people noticing.
While they could update the list, it's still typo correction. As implemented, the url needs to be typed in the location bar and the domain can't exist.
Edit: sorry about that last part. http://amazon.co does exist and does get corrected.
The source code is over there (GPL): https://hg.adblockplus.org/adblockplus/
The article seems to say this is related to the typo feature, but https://hg.adblockplus.org/adblockplus/file/tip/defaults/typ... has never changed since the introduction of the feature in 2012-11.