After months of reporting, TheStreet found more than a thousand of Twitter profiles advertising escorts and dominatrixes, and at least two international networks of escorts that "rely on the Twitter platform to promote and execute their services."

Twitter CEO Dick Costolo used to do improv at Second City and likes to say stand-up comedy taught him everything he knows about business, but his joke reflex fell painfully flat yesterday. (The full NSFW Storify is below.)

Tumblr says it wasn't hacked, but it looked that way to a hell of a lot of its users: for a harrowing fifteen minutes, images of sexual intercourse, Satanism, and other horrors permeated the Tumblrverse without apparent cause. The kids are not alright.

In the slow battle between humankind's love of porn and Tumblr's need to somehow make money, we find ourselves in a sort of ceasefire: boobs can stay, but they won't be easy to find. Caught in the armistice are plenty of inoffensive things. Why can't I search for #gay on my phone, but it's easy to find naked teens?

Only two days after we wrote about Tumblr's capitulation to advertising interests—by blasting porno Tumblrs out into the phantom zone—the company is already apologizing.

When Yahoo's billion dollar Tumblr pickup was nothing more than coquettish tech talk, we wondered if a new owner would start enforcing the site's own rules. You know, shutting down pages about underaged girls and glorified anorexia. It looks like it's starting. Slowly.

We do a lot of joking about how Snapchat is just for dickpics, and this new site (NSFW, of course) proves us wrong: Snapchat, a company with millions in venture funding, is used for all sorts of embarrassing sex shots, and they're being uploaded to the public without permission.

Two years ago, Tumblr's overabundance of porn was well-documented. Today, nothing has changed: it's still a JPEG sex bonanza. Which is A-OK with us—but what would Yahoo do about the blowjobs, wrist-slitting, racism, and other advertising-unfriendly stuff?