I know exactly how I'd respond: I would thank him for doing a great service to humanity, and then I'd ask him whatever tech support question I had. And I'd be thinking to myself that I won the tech support lottery, because I'm pretty sure Ed Snowden knows more about tech than your average support person.
There are many in the German government that would love to give him asylum, but they dare not risk it. Not a fear of the voting public, but the wrath of the US.
Considering there's still a treasure trove of documents he has yet to release, I'm sure the Russians will be keen to keep him on the payroll until all the documents he has are released.