I think it becoming to feel like a witch hunt because "Max" has not directly address whether he is Mark Essien, so everyone is speculating.
His apps are legit, in that they exist but they do appear to contain content scraped from internet without any apparent attribution. Given the random mix of sources i don't think he has written permission from demand media (ehow.com) or the other random places the content comes from. His revenue claims may or may not be true, or may HAVE been true.
I will point out one last thing.
This app (http://appshopper.com/education/paintings-you-should-know) now deleted "Paintings you should know", was previously uploaded to the feather moor account. The one app that appeared on Maxs now deleted "Cube Of M" site was this "Art you should know" (http://itunes.apple.com/app/art-you-should-know/id356153267?...) its obviously the same app.
Notice "Seller:Mark-Anthony Essien", so that links Max to Mark.
More importantly though his second name is Anthony not Max or Klein (like he claims in that blog article).
This combined with Marks willingness to actually meet people in real life as Max makes me question why he writes and his end goal with his writings and half truths.
I'll leave it there, people have the information that is out there and that was my only goal posting these messages, to inform.