I think it’s the latter. I’ve no issue with most things being one-and-done. But some channels have phenomenal content that I’d like to keep for the long term. Something might happen to their channel that makes it difficult to get, so I’ll regularly update my downloads with new videos, pictures, etc.

This applies to ripping, too. Funimation removed Drifters years ago, but I’ll always have a copy of it because I ripped it. Of course, I need to store it so it still costs money. But I can be content that I have the content.