The law in the Netherlands is quite clear upon data-storage on who is the rightfull owner, as long as the company is registered in the Netherlands, it will be a hard and harsh fight for the US and other country's to lay down a claim upon data, especially when it is not again the local law of the Netherlands.
I'm aware that not everything is as "ok" as we sometimes believe, but keeping stuff liquid on RAM-drives means u'll have multiple servers hosted across the globe and perhaps an server nearby your location to collect a backup in case of.. well you know
The moment we ever move from that safe spot, the US would grab us. The US might play dirty tricks, accuse of us other things ... whatever they can. The best approach is a layered one. There are benefits to customers too: No subpoenas or warrants possible.
RAM drives mean we have an constantly-streaming encrypted backup system, yes. And it does mean if something fails, we end up needing to manually enter the key to restore. I believe this tradeoff is worth protecting everyone's data.
Nobody can every say you guys haven't gone the extra mile for security, that's for sure.