Is it still dodging a paywall, if at the time of download from Pixiv (12.02.2023) the artwork in question was not yet paywalled? And I had only discovered it while going to get the source?
I understand that it cannot be proven in any reliable way, but, uh... kind of bummed about this, to be honest.

If other imageboorus have the image and point to the same now-deleted source then it's probably fine.