You are right, CertSimple is a competitor (reselling Digicert), but nothing in their blog post is wrong. They may be getting benefical advertising from this pos

You are right, CertSimple is a competitor (reselling Digicert), but nothing in their blog post is wrong. They may be getting benefical advertising from this post, but they are doing so by providing a public service calling out the baseless fear mongering from Symantec and other CAs. As nailer replied, it may be common, but it is not right. Those tactics should be called out and shamed whenever possible.