What is MFA?

When spam met machine translation, the Web grew more hospitable to Google ads.

Light Blue Touchpaper: made for adware€ (MFA) websites [are]€” those parts of the web that are created solely to host lots of (mainly Google) ads, and thereby make their creators loads of money. ... they take existing content from other sites and do word substitutions on sentences to produce what they clearly intend to be identical in meaning (so the site will figure in web search results), but different enough that the indexing spider won’t treat it as identical text.