Match drops 5% on Facebook Dating, WeWork’s valuation may get halved, and Slack’s “10M” problem

Summary: Tinder-owner Match fell 5% on word Facebook’s new dating feature goes live, like, right now — even though Match already knew the competition was coming. Slack released its first earnings report since going public, revealing its next 10M users are harder than the 1st 10M. And WeWork may slice its valuation from $47B to about $25B before it IPOs because critics think its IPO paperwork is a “masterpiece of obfuscation.”