And that means they don't want share with their shareholders the value Tumblr generates. It's really mibd-blowing to think that anyone would have thought what Tumblr did was a good idea. I totally agree with their goal of shutting down sketchy and basically fraudulent ways of making money. But at least make a genuine attempt to provide a compelling alternative way for bloggers to make money.
The value of a social network is entirely in the community and their desire to devote time on the site (and not at all in any functionality or technology per se). By killing the vibe in the community they're basically burning money. Tumblr is dying in one of the saddest acts of corporate suicide in the last ten years.