Oh, that’s sad. Placemark was a very nice as it was for collecting geographical objects where the associated data is well structured. This is always a hurdle when integrating the generated data into other systems.

My coop has been working with something resembling to placemark: https://cocarto.com but our business model is not to sell it as a SaaS (which is always very difficult, and requires a lot of capital to reach enough customers) but sell a service to companies and administration around it. That’s why it’s FOSS from the beginning.