They actually have Adversal/Clicksor/Google Adsense. I believe this is more than enough. I don't understand why they even need adfly which is totally annoying. this is the first host that actually use it. its frustrating for the uploader to put their own adfly, when it appears twice.. for the downloader

P/S: this is not bitching or complaining. but this is opinion as one of your uploader.