I wanted to add my voice to the chorus here, I was confused when I hit a storage limit on Publish because I thought I was paying $50 for more storage, but it turns out Publish and Sync storage are different.
I use a publish site as a way to share updates with an important group of stakeholders and recently had to go through and “unpublish” a lot of images to free up space, which makes for a very awkward experience and now I have to scroll to the bottom of a list of a hundred images every time I want to manually include one.
Much easier if there was a way to pay for more storage on Publish and if you offered this I would buy it today without question.