Blaze Wordpress Plug-In

When I logon to wordpress.com, and I still can!, I see adverts for Blaze and Yoast.

How much does this cost?

Clicking through the Wordpress screens a single page for a week was $35. (US $ I presume)

Where do the ads appear?

On free Wordpres.com sites and Tumblr. i.e. in very few places!

Just read the reviews about Tumblr on SiteJabber