Well said. Every project has to determine their own path to sustainability. Knowing only what I've read here, I'd sell support in seat packs, e.g. $1000/yr fo

Well said. Every project has to determine their own path to sustainability. Knowing only what I've read here, I'd sell support in seat packs, e.g. $1000/yr for every 250 users. A good sized university might have 1000 engineering students and $4000/yr for a critical tool used by all their classes seems reasonable. The great thing is that you define support however you want. 24/7 phone? Email during business hours only? Just make it clear to the customer so expectations are properly set. A business might only have 10 people that use a tool like Octave but $1000/yr isn't a big deal if that tool is necessary for their daily work.