Upgrading Cloud Storage

I am on the Lightroom CC-only plan at $9.99/month including 1TB of cloud storage, and have been a loyal and dutiful customer from when Lightroom CC was split off from Lightroom Classic. What sold me at the time was the idea that your entire library of photographs could be saved to the cloud, and would accessible from anywhere as though you were on your main computer. To this end, I imported the entirety of my previous libraries and synced it up to the cloud. Even at a couple hundred gigabytes, there were numerous synchronization issues that I waited patiently for Adobe to solve. Eventually they got it right, and the synchronization seems to be relatively smooth now. By steadily importing my pictures over the last few years, I'm now coming up to the 1TB limit. When I click the "upgrade" button, all I seem to get are options to add Photoshop and other Creative Cloud apps, not to add storage. Doing a quick search here found a few posts about a pull-down menu to upgrade storage, but that's not available. There were a few comments about calling Adobe directly for this option, but that doesn't seem to be mentioned in the upgrade pages anymore. What gives? I don't need Photoshop, I'm not part of a team, and I don't need both Classic and Creative Cloud. 

Why is it so difficult to add a bit of storage? I wouldn't think 1TB in storage is too far out of the ordinary, and I think I'm using the service as Adobe intended it (which, according to my understanding, is to sync up the entirety of my photo library to the cloud). Am I supposed to be using it differently? Am I supposed to delete rejected photographs ruthlessly in an effort to save cloud storage space? That doesn't seem to fit the as-advertised use for the Cloud, though, and I'm very reluctant to delete anything I've captured because I've found that photographs rejected for lacking aesthetic merit still oftentimes contains contextual information that proves valuable and even critical years later.

I'm trying to get an archival use out of Lightroom and the cloud, perhaps this wasn't as intended? But if the idea is to limit the use of the cloud to the most recent photographs and that I should be moving over the old ones to local storage, it's incredibly cumbersome to do so - to my knowledge, the only way to do this is to download them in groups by selecting each one. Some of these AI features like facial recognition,or those that do qualitiative analyses to help narrow down retained photographs are nothing but novelties, and I simply don't have the faith or trust in a computer to do my subjective thinking for me. I don't know why engineering resources are wasted on this trash when they haven't even gotten around to implementing basic usability features that, for once, keep the promises they made to their users.