While trying to sign up for Alfursan I found they don't list my home city (Bothell, WA, near Seattle). How does this work? Am I able to sign up using, for example, Seattle and then have it changed once I'm registered?

Also, what is the typical response time from their customer service? I emailed my question to them on Monday and haven't heard back, but I normally wouldn't be worried unless I hadn't heard back in over a week...