My wife and I are taking delivery of two new Gen 3 Prius. We will each be primary on one, but my question is how should I register with Entune. As I understand it, there are two ways I can go: Option 1: Both create primary Entune accounts for our separate vehicles and then we add the other as sub-users for the opposite vehicle. Option 2: Create a single account, register both vehicles and then decide who will be primary and secondary. I see potential benefits of #2 in three years when we will have to continue service. Will I get both for the price of one ($5 per month)? Am I missing something better with #1?