The most recent complaints, which were sent to the Taiwan Fair Trade Commission earlier this year, note that Samsung worked with a local ad agency in having HTC attacked online. For its part, Samsung Taiwan says that it regretted "any inconvenience and confusion" that it might have caused and has stopped any form of marketing that involves "posting articles on websites."
So next time you are talking to someone online that is telling you how their phone is the best and seems to be pushing a particular brand, keep in mind that you might not be talking to the person that you think you are. You might be talking to some college kid in Taiwan paid by one of the handset manufacturer's to put down a rival.
source: AFB, TheVerge via AndroidAuthority