This case has been on the radar for some time. I reported the case:

* Back in March to the "Suspected users that are abusing merit 3.0" thread (https://bitcointalk.org/index.php?topic=2896910.msg32817919#msg32817919)

* Again it cropped up a couple of weeks ago when I checked which users were on their way to ranking up (https://bitcointalk.org/index.php?topic=3338915.msg34933172#msg34933172)
-> * asche -> Weird: Nearly all Merit comes from Oscar2000 in ANN threads. -> https://bitcointalk.org/index.php?action=profile;u=1580039).

I didn't see any action taken (until today), so I gave up on the case. Finally Karma caugh up.