I think it's clear she learned a few years ago it's much easier & much more lucrative to be a cable news talking head, author, reality show star, and line up for the gravy train of traveling speeches than it is to hold the most difficult job on the planet.
But, she'll keep dangling the possibility out there so no one forgets about her.
You’re right. SP is running, once again, to boost the value of the SP brand. This stuff will continue until the first filing deadline. Then she’ll return to other ventures.