TechCrunch

Twitter is working on ways of getting more juice out of its vast trove of user content — that new “blue line” for conversation threads, for example, is a way for older conversations to resurface — so I don’t know how it is going to feel about this: a developer called Pierre Legrain, once himself a member of the Flock, has come up with Twitterspirit, a service that lets users set an expiration time for their tweets with a simple hashtag. Think of it as a Snapchat for Twitter, complete with its own emphemeral imagery (for Snapchat’s cute ghost, substitute an equally hard-to-pin-down spirit).

At a time when our data appears to be slipping out of our direct control, Snapchat has grabbed headlines for offering consumers a way of sending each other messages that disappear after a period of time. Twitter, of course, already lets users…

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