Sooner of later they will get you banned from adsense. They have no unique content so they will not rank well in search engines.
Actuality they do make money but it isn't as easy as it used to be. Google is getting tough with them so your best bet is not to invest any time in MFA sites.
Yep most MFA sites get banned... BUT, you can still do some pretty decent ad-arbitration and get away with it. Lately I've used an ad arbitration setup and posted it in the jobs listings on craigslist averaging $1 PPC.
Just like spam: If it didnt work nobody would do it. It's just not as always as easy as it would seem.
Of course it works. why would people use it if it did not work ? MFA can be many things, does not have to look like crap you know.
What u need to do is use a program that auto creates scrapped content and then cloak redirect your sites (with no adsense) to the white hat looking site with adsense that way your blackhat sites will get banned but your white hate site won't
Wow, people are really getting paranoid about mfa sites. If a site is half-decently useful, then it can get away with being plastered with ads. Makes way more money also
If you don't care about SEO, scraped content will work for you. Buy Traffic for Low CPC, Sell traffic (Send that traffic to a MFAA page) that pays good.