Well because it can actually be cheaper than a protracted legal fight, of course.

Especially if the issue in the case is just about how much to charge for replacement keys.

Sometimes it's cheaper than paying the lawyers. The settlement terms in the VW case mostly consisted of informing customers who could make keys for them, and giving vouchers to certain customers for reduced-price duplicates.

Depending on whether Ubisoft really sees this DRM strategy as critical to its survival, it might settle such a suit, or try to head one off before it got to court by changing its DRM policy.