@Shadow_Blitz
They are
totally worth keeping. If they re-bloged a piece of art from a deactivated blog you now have it. There will be a bunch of duplicates, but storage is cheap. I’m assuming most of this will be sent to archive.org when they have time to work out a plan and some scripts.
Ironically, this was a big reason that CP lasted so long. They would ban a blog that got reported, but all the re-blogs would stay. I’m assuming people would upload a ton of illegal stuff in one blog till it got banned while having a hidden “SFW” side blog that auto re-bloged all the posts.
For finding more blogs, I select one that is mostly re-blogs that hasn’t been flagged yet. This means that /archive still works and I’m not forced to use the stupid half width browsing area. I select the filter-by-date drop down and go back to the earliest post. Then I scan through and try to find art styles that I don’t recognize, or names I don’t recognize in the browser’s status bar when I hover over the posts. Their filter is shit and there are always tons of super explicit visible posts. Browsing flagged blogs in the half-size window also yields the username on blocked posts. Have my master TumblThree instance running with it’s clipboard monitor on and just copy every link I see. It ignores duplicates automatically. That lets me find a lot of older, maybe inactive, blogs to harvest. If you can go through an artist’s archive, you can also easily recognize posts from different artists.