Wow, the irony is Pinboard, the very service that championed the idea of "Don't be a free user" (1) is now shutting down (edit: sorry, ok not shutting down officially but apparently it's in a free fall for quite some time and nobody gives a damn (2)). Their article argued that free services often turn into pump-and-dump schemes, while paid services promise sustainability and better support. Yet here we are, witnessing the demise of a paid service that couldn't sustain itself.
It's a stark reminder that even paid models aren't immune to market forces and operational challenges.
Maybe the real takeaway is that no business model is foolproof, and unless you can self host something you can never know when and how it will end.