Of course, in this case the feud is ultimately being used to help promote Betty Buzz. The video has more than a million views and Ryan Reynolds' comment has over 20,000 likes, so a lot of people have seen it, which means they've also heard Jackman's support for the drinks. This might not have been a paid advertisement, but the video is certainly working as that. Even if Jackman wasn't asked to record this video, he certainly did it to help support his friend. You have to figure a few of these million people will give the drinks a try.