It is all in how they implement it. If the companies outlined in the article keep affiliates it could be really good, even if they cut the comission percentage down some.
The slot machine games found in land based casinos have a huge amount of visitors searching the internet for online versions. Eventually, this could spell the end of many online game makers unless they are sub-contracted to develop these games.
For example, my click thru rate for Wagerworks (develops online versions of IGT land-based slot games) hovers at 80%. Over 133 free play signups in June alone, far exceeding any other program. However most are from the US which is the downside.