Premium Upsell Email

Upgrade emails drive users to switch from free to paid accounts, or from lower-tier to higher-tier accounts. This works via the psychology of loss aversion. Basically, people feel a sense of ownership over something they possess, even if it was given to them for free. People are naturally disinclined to give up something they possess, and will pay to keep it– and so, upselling on a product they already use can be very effective.