Sourceforge stopped it, filezilla did not.
And Filezilla explicitly defended the sourceforge practice when it was still in place. They're a very shady project.
Re:Shutting down public FTP services
by SippinLean on Wednesday April 26, 2017 @09:31AM
(#14202753)
It's not just if you dl from sourceforge:
https://filezilla-project.org/download.php
>This installer may include bundled offers.
https://news.ycombinator.com/item?id=8849950
But you could always get a normal installer even then, and I think (don't quote me on that, I never really used SF) Sourceforge stopped doing that after their acquisition ?