Guys

I've been preferred for the last few years (only have had about 20 rentals over a 3-year lifetime). I guess you need 12 rentals in a single year to qualify for Avis First

However, even as preferred, I have always got free one-class or even two-classes upgrade at US locations. In YVR however, they refused me an upgrade even though there were cars (they told me I'm only preferred)

Any tricks to get First without doing 12 rentals in a calendar year?

Thanks guys