I think if they chose the right city, it could definitely be worth it to do a convention here in the US. 1% percent seems pretty close to me. And like Amanda said, those polls can be a skewed sample because not everyone sees them. I don't think I remember seeing the poll you're talking about or voting in it.
Bummer.
It's clear that Reign does have a lot of non-US fans, though - and very dedicated ones at that.