AdFly is not adware. It's an ads website that displays you some ads for a few seconds before you can continue to a download, do not confuse it with adware.
Adfly is well known for being a malware distribution channel. Ads run on adfly support flash/js/everyhting else and aren't vetted, nor do they have any form of anti abuse.
The Minecraft mod sites are full of drive-by crapware. I know, my 6yo watches Minecraft videos all the time and wants a new mod every day, so I download and install them for her ... her own machine is Ubuntu of course, 'cos the 2006 video card doesn't work in Windows any more but is just fine in X ;-)
