OSS devs rely on donations, but office hours would be a great paid service. The demand for OSS is so high, depending on the centrality of your library, you could easily charge $10-$100 an hour for this.
People always expect free Github replies and responses to PRs and issues. But it is almost taboo to expect free consultation and office hours. Great way to make some money if you have developed a popular library!
It seems like the bulk of OSS developers I know do not get paid, but are obsessed with a particular problem domain (or have essentially merged with their tool and become a finely tuned cyborg).
Because I sell license keys to unlock features, it allows me to provide generalized support and quick bug fixes via the discord for everyone for free. If people need help with integration in their specific code base then that's when I ask them to go through the "consulting route" - if it's quick they use otechie. If it's more involved (1+ days) then we work out a contract arrangement.
I hardly get any clients through these means but it does put a clear value on my time which results in the community appreciating the time and effort into the project and the real time support (via discord).
People always expect free Github replies and responses to PRs and issues. But it is almost taboo to expect free consultation and office hours. Great way to make some money if you have developed a popular library!