The bad news: Zee Maps, the company providing this service has changed the terms of use and has locked our map and is demanding on order of 20 USD per month to restore access. Like true professionals, they did this in a blog post with four days notice.
The good news: That this could happen was not unanticipated, and is the reason that the ability to export data was a key requirement for the service we used. I have made semi-regular exports/backups of this data over time, and will have all but maybe the very last few pins in a backup.
Assuming I can find a comparable service to accept imports, I will migrate the data and change my links in previous posts to the new destination.
Failing that, I can just publish the data in a Google Sheet? I can add a search or sort function to that, ...and accept/screen new submissions via Google Forms. We won't have a pretty map with pins, but we can have the data.
And then that can work for a while until they kill it off or start charging for it. These are the risks of living life freemium.