Actually, I do not. The server it's hosted on runs other services that I, my family and some friends use, so as long as someone is using it, I'll probably keep funding it. That's not like it costs me hundreds of dollars a month, so I'm fine with that.
I'm open to donations though, see <https://heimdall.pm/#donate> :)
Edit: typo
Serious question: how do you guarantee this service will keep running given you don't monetise it?
I'd rather pay you or have the annoyance of some ads