I just downloaded the source for ntfs-3g[1], and it doesn't appear to have any binary blobs in it. In addition, it's under the GPLv2 so integrating proprietary components is unlikely to be legal. The answer you linked quite clearly says that the company offers a proprietary version of ntfs-3g. The answer does not say that ntfs-3g is proprietary.
Also, Trisquel (an FSF-approved GNU/Linux distribtion, meaning that it doesn't have any proprietary software within 100km of the distro) has packages for ntfs-3g[2]. So it's _definitely_ entirely free software.
So again, you're wrong on this point. In addition, I strongly believe that you were never correct on this point. Maybe you confused ntfs-3g with the proprietary version that company sells?
I stated how it was in the past[1]. Anyway according to [1], it looks like ntfs-3g still uses a proprietary version of ntfs.sys
[1] http://superuser.com/questions/139452/kernel-ntfs-driver-vs-...