No but what is the EU going to do to a US company that will likely never set foot in Europe. Unless of course Mr Trump is keen on getting a golden visa
Either way, I asked my lawyers if I had to answer, given that we had zero revenue coming in from Europe. They said no, I didn't for this kind of request, but they could easily send me a more vehement request that I did need to answer.
I ignored the EC, and didn't get that second letter.
BTW, my lawyers are smart enough that I had the only search engine threatened by but never sued by Perfect 10.