People actually read those blogs in the first place?
There's no magic here. These guys sit here and read this website and then vomit it back out on their blogs. Very little creative thought and original content, all they seem to do is publicize good things to the masses which then ruin them. The credit card companies are well aware of what we do, yes, but that's not the point. Schemes like churning seem to get ruined when everyone starts doing them after reading about them on some yahoo's blog. So in short, it's not the publicity, it's the volume created by these blogs.