how about the guy selling 5500 sites to people telling them he is making $48 a year with each site.. Now if that were true why would he be selling them for $1.5 each?? It never ends on here....
Not only brain is fully utilized, you have to go beyond utilization to think about the ideas, content, keyword.. etc..
Adding lot of fresh content to a single site with good link Development will get good traffic than Adwords .... For FREEEEEEE ! ( + Effort )
MFA sites definitely are a disgrace to all webmaster community and the entire advertising industry. just like advertising platforms using stolen content. keep in mind that a lifetime advertising revenue of a n active professional webmaster easily goes into 1-3+ Million us$ ... being banned thus means losing Millions us$ for life hoping to find another family member to create another fake MFA account may soon stop to work BECAUSE more and more people start to blog/publish and thus to sign up adsense on their own. leaving less and less ppl willing to risk their lifetime millions for a fake publisher. any family member - including your own children - would simply be plain stupid to give their name for another MFA account and thus loosing a lifetime publisher's revenue of multiple M$.
Yeh MFA sites are worthless. Risky and dissapointing for other webmasters. Steer clear of them and you should be fine. Really it pays to create your sites by yourself.