To clarify - we mark our reservations Do Not Upgrade, which means that HAL will not give us a free upgrade (since sometimes their idea of an upgrade does not line up with ours). However, we STILL get Upsell offers, which means that HAL contacts us to see if we are willing to pay a bit more to move up a category or two. This happens on most of our cruises by the way.
Another point, just a month ago HAL starting offering these paid upsells around 45 days prior to our sailing (it used to be 2-4 weeks), so watch your emails closely.