That is very relevant here.
chez17's comment implied that the whitelist applies to non-invasive and non-annoying ads, while there are a number of new qualifiers here, including a payment which you have omitted from your post.
They entered into an arrangement with Google where Google agreed to meet certain standards and be vetted; Bing and Yahoo have not.
..and perhaps most importantly, have paid for it.
The whitelist standard is not just about non-intrusive ads as the title of the setting implies to users, it's about a payment too.