Keith's 25 October update: Erika Vick and NASA PAO have declined to respond to a series of questions regarding this Twitter account. Perhaps that explains why @ExperienceNASA has been taken offline.
Keith's note: Apparently the operation of the @ExperienceNASA Twitter account is part of Erika Vick's official duties at NASA. It is not clear what NASA program(s) this activity supports or what the guidelines are for what is proper content for this Twitter feed. Despite repeated requests no one at NASA HQ including NASA PAO and Erika Vick at the NASA Advisory Council can give me a straight answer. @ExperienceNASA was silent during the shutdown - as were all other official NASA Twitter accounts. Its description says "Welcome to your one-stop shop for opportunities to participate in/contribute to NASA goals/missions! Need help? Ask me! Washington, DC · nasa.gov"
Another Official NASA Twitter Account That Isn't, earlier post