Earlier quoted context omitted.
I think you've done a very good job of doing something which a developer will grog. I think you've done a very poor job with doing something which a court will grog the same way. I think that's where the astronomical potential liability comes in with respect to using your product. A lot of 2.1.a versus 2.1.b will hinge on details of how a court will read ambiguous language like "not primarily database storage or oper…
I don't know about the US specifically, but here in Europe the courts take a dim view of trying to weasel around wording when the intent is clear - if the intent is clear, that's the most import thing.
I don't know about civil law jurisdictions, but in the US, this license is a liability bomb.