So, you may have seen this fun little image going around lately. At first glance, I can understand why this might seem bad. “Holy shit!” somebody who has read this out of context might say, “This means that tumblr can take whatever I put on tumblr and use it however they want, including making money off of it and not giving me credit!”
However, what this picture fails to show is the next part of the clause.
What this says is that you can reblog somebody’s art, and they are not able to sue you. They put it in so many words, but that’s literally all it says. Tumblr can’t steal your art and claim it’s their own. They can put it wherever they want on their website, but that’s not new. The only money they’ll be making off your art is the money that they get from people who are purchasing ads on this website. This also allows this:
which is what allows you to reblog posts on tumblr without fear of being sued by the content creator.
Essentially, what these clauses do is ensure that tumblr stays the free website that it’s always been, instead of a place where expression is limited to what a content originator wants it to be.
tl;dr: Seriously, nobody is going to steal your shit. Really.