I come across those blog a few times a week. There's one post and it's a series of banners from many programs. No content, just a blank promo. Others will try to write something about the program they want to sell, but it's still a blank blog.
I don't understand this trend. Why do you open a blog and write only one post? Why do you use a blog to promote a list of programs?
There's a ton of downline builder that could be better and offer you to promote those same program.
Do you really think that it's a good way to promote those programs?
If you want to promote a programs in traffic exchange, use a splash. The best tools for that is AdKreator.