No they haven't. Cloud Based Storage for Plex is simply not possible unless you 1. Have a small collection, in which case literally any cheap box and a hard drive would be a cheaper and better solution. 2. Rely on Google for "unlimited" storage and access, which they can take away tomorrow and you would have no alternative service to move to. Any other "unlimited" service closed down or changed their policies. Even the official plex cloud is no longer a thing. I use google for backup, but not for an actual service.