I think this is really important! As open-source as everything is and as generous the developers are with their time and skills, they for sure deserve to make a living out of this great tool.
There’s the donations page Logseq - Open Collective
But I’m happy to know @tienson mentioned this:
example business models
Obsidian as an example
I personally think the Obsidian Business’ model would work great for Logseq, making advanced tools like easier syncing across devices, and mobile apps paid services.
The difference is Obsidian is not open-source, although it feels like it is.
Sustanability of Logseq
Like anyone else I enjoy a great powerful tool like Logseq for free, but if we want it to grow and last over the years, it needs to be fueled by a solid business model.
However of course there are the core philosophies of open-source which are amazing, and it’s up to the devs to see how they want Logseq to evolve over the years.
Example of Blender.org
As another reference point it’s worth checking out Blender a 3D tool which in my opinion is one of the most successful open source projects.
Blender has been able to finance their work by working together with big companies that sponsor them in exchange for better tools (which are publicly avaialble) it’s amazing!.