The Editcount extension currently does not support the actor functionality at all. It doesn't yield any errors, but it will not count any edits made by users that are attributed through the revision_actor_temp table.
I have already fixed that on a forked version of the code, so it just needs porting and minor adjustments.
Change 558582 had a related patch set uploaded (by Ostrzyciel; owner: Ostrzyciel):
[mediawiki/extensions/Editcount@master] Editcount: support the actor table
Change 558978 had a related patch set uploaded (by Ostrzyciel; owner: Ostrzyciel):
[mediawiki/extensions/Editcount@master] Minor code style adjustments
Change 558978 abandoned by Ostrzyciel:
Minor code style adjustments
Reason:
nah, I'll amend it instead
Change 558582 merged by jenkins-bot:
[mediawiki/extensions/Editcount@master] Editcount: support the actor table
@Magwac: All patches merged or abandoned. Is there anything left to do in this open task?