I think you're right to trust the EFF more than the Seattle Times here. That editorial says "The law was narrowly crafted to target Backpage", and that the law

I think you're right to trust the EFF more than the Seattle Times here. That editorial says "The law was narrowly crafted to target Backpage", and that the law is only aimed at "classified advertising company representatives". In fact, only one of those four words appears in the bill at all -- "advertising" -- and only then to define it so broadly that it can apply to virtually any public speech or writing.