Maybe unfairly but quite disappointed at this development.

This sentence crystalises open source:

> "Unfortunately over the years there have been cases of people forking the project in the attempt to set up a competing service."

You make something for everyone. And they may use it as they please. This is what open means. Did the author make something open source with the hope that nobody would actually use the gift that they made?

Mataroa [1] also started with MIT license (directly inspired by bear blog) and it subsequently changed as well but to Affero GPL instead.

[1] https://github.com/mataroablog/mataroa