The economical (and successful) model for handling data of this sort is batch processing, possibly with some tool like Hadoop -- and our market research shows that many potential customers are already using this.

If we provided a live database to customers we'd have to make at least 10 times the revenue in order to cover variable costs and I'm not sure we could provide a service with satisfying performance at that level.

RDF technology is rapidly advancing and there's no substitute right now for a customer providing his triple store on his own machine with a lot of RAM and a few SSD drives.