blurker means one who reads many blogs, but leaves no comments and does not have their own blog. Lexicurio rates it Sui generis — a strength score of 100 out of 100.
Etymology
Blend of blog + lurker.
noun
- One who reads many blogs, but leaves no comments and does not have their own blog.“Ever met a blurker? That's boosted from lurker, "someone who reads a forum conversation but doesn't contribute," and in a blargon portmanteau means "one who reads many blogs but leaves no evidence of himself behind."”