Twitter acquired and shutdown Vine, Periscope, and Posterous (what could've been substack) among many others. They seemed rather complacent and uninterested in

Twitter acquired and shutdown Vine, Periscope, and Posterous (what could've been substack) among many others. They seemed rather complacent and uninterested in innovation, or even profits. I have no sane explanations for the management of the business side of their operation.