Sneak: we can RSS some tumblrs but not others! There seems to be some weird major difference between username.tumblr.com and tumblr.com/username, and all username.tumblr's also have tumblr.com/usernames but not the reverse? We are perplexed by it. Regardless, only username.tumblrs seem to allow RSSing or viewing for more than a hot second without an account.

All we can say is, thank goodness we developed the habit of downloading everything we like years back. -_- we learned from tumblr in 2018!