Earlier quoted context omitted.
Not sure how those developers measured piracy in general. But piracy is naturally increased by limiting legal sources for buying something. Other developers commented on this very issue, saying that existing DRM increased piracy.
I'm not going to continue this off topic conversation.
It was also not bought by people who see this obtrusive nonsense which drains CPU resources and degrades performance as something to avoid. In the end, they only lost sales. I wouldn't call Ubisoft or any other legacy publisher rational. Rather irrational control freaks.
Besides, Ubisoft's DRM will be broken, same as all others.