Twitter jumps 12% after posting a job listing citing a potential subscription platform (TWTR)

**

· *Twitter on Wednesday posted a job listing saying that it is building a subscription platform codenamed "Gryhpon." *
· *Shares of the company surged nearly 12% on Wednesday. *
· *"This is a first for Twitter! Gryphon is a team of web engineers who are closely collaborating with the Payments team and the Twitter.com...