Tumblr Users Are Already Revolting Over The Potential Yahoo Buyout
It is worth noting that all that has taken place is an offer. It still remains up to Tumblr to decide whether to accept.
While it is difficult to turn down over a billion dollars, we may hope that tumblr will see this offer as a validation of the tremendous potential for increased value in the years to come. If only they will see it in that way, it would be unwise to sell now.
I expect they will almost certainly take the money and run, but that is not the only possible outcome.