Most products have a general value proposition, with your example of the purchasing of a network, I would go with a value proposition of we make networking easier or more effective something like that. So my example would be something like, "We make it easier for entry-level business people to network with the top CEO in their industry." Now from there, you can build off various use cases to curtail it in sales situation behind your new prospects context. Essentially while everyone may want to have that network everyone's approach to having that network or need of that network will be different. So you would curtail your value proposition to the individual you are selling to needs.

I hope this is useful information if you need more help reach out to me, I'd love to help you!