People keep moaning about A&A using CACert in some places. Although this is fine for most of us, some moaning ninnies seem to think using verisign or whatever is better.
So, to cut the crap, people wanting "real" certs, pay a little extra to cover this cost so that us that are Just Happy do not.
People with access to premium service get shiny whatever cert that doesn't moan, rest of us keep on finding fun ways to add CACert to make the shebang boom.