Curate, connect, and discover
Im such a tumblr guy.
Like, seriously, even before making or regularly using my account, i used insta to read screenshots of tumblr posts, i used reddit to read screenshots of tumblr posts, hell, i had some discord circles that mostly sent tumblr posts.
The fact that tumblr is so commonly screenshotted is semi-unique to it, i think. The only other platform that is reposted to other platforms that comes to mind is twitter, and to a much lesser extent.