It's an interesting project, but I'm confused why they got funded with EU money. Their company is based in Boston and it looks as both of them are living in them US, which suggests neither of them is European citizen or pays taxes in the EU, which ultimately is where the money for these grants comes from. The funding requirements of NLNet state "it is a knock-out criterion for each project to have a "European dimension [...] where a significant contribution towards the vision of the Next Generation Internet initiative also qualifies".

I'm not trying to pick on this particular project, I just found out non-EU projects can apply at all. I hope the majority of NLNet money goes to projects that actually are executed in Europe and build expertise there.