Fun thing is that when you - for some reason - decide to move, it's just the matter of exporting stuff from our instance, importing it elsewhere and all we have to do is to turn on federation for the new instance.
Anyways - we are grateful to host such a quality content and hope your students will benefit from ad-free experience as well.
After all - it's all about having fun community, that does stuff they think it's worth. And now you're part of it 😀