Thanks to HueyData for bringing this up. For the post titled

• MDF Magic - "Rolling Sale" - Up to 25% off

that was posted at around 11:55am today by user "Sylvester99", it has been voted by multiple new users with a few sets of same IP addresses (and I can confirm that they are not transparent proxies by some ISP).

As our policy of zero tolerance on sock puppeting, OzBargain has now permanently banned MDF Magic.

I will continue to announce banned domains over here in the announcement forum to "name the shame" — sock puppeting is definitely not the marketing technique to be employed, at least not on OzBargain.