At the moment this expansion really isn't worth it. However, the smartest people, made 30-50m+ within the first 3-4 days of the expansion where the new item prices were overpriced. Many didn't pay more than $5-10 as well, so not exactly pay to play.

So basically there was a ton of gold to be made, those who put forth the effort made a killing. The first week or so was pretty much the highlight of the expansion. Nothing else really. Just the same old maus farming