Alternative proposal: extend Graphryder with a multisite mechanism similar to the one Discourse possesses. Means having multiple parallel configurations available, and the graph shown by Graphryder depends on the configuration that was activated when accessing it.
This would fit in better with the system of federated Discourse sites that we’ll create to provide proper whitelabel platforms for POPREBEL, NGI Forward, Blivande (if you like) etc. – see here under “1. Solution: Federated Discourse site” for some details. Because for each client having their federated “own” Discourse platform, it will also appear that they have their own Graphryder instance to explore it.
It would also be less complex, as no complex user-and-roles feature has to be implemented. This way, it would need less than the 15-20k EUR (which would require investing from Edgeryders profits as it exceeds the budget share in POPREBEL / NGI Forward).
Fixed it for you in my original post 
No, except for possibly a reason why this whole category is still protected? I think it’s intended to become public at project start (whatever counts as that). cc @anique.yael