In the 5 months I've had my Model 3, I've spent a total of $40.19 at Superchargers.
Of that, $4.92 was before I got my Wall Connector installed.
$11.52 was from an unexpected middle-of-the-night run to Greenwich, Connecticut after leaving the car parked at the airport for a week. (Long story - I landed at midnight and immediately picked my brother & sis in law up so they could catch a 7am rebooked flight ...)
So, excluding unforseen circumstances, $23.75 in actual supercharging in 5 months.
Don't forsee using any in the next month, either. That's when the referral-credit-I-didn't-get would've expired anyway.
So what's a 2-year free unlimited supercharging credit worth with my usage pattern? Not much - cancelling and replacing the order wouldn't even remotely be worth it ...
But for the five minutes it takes to cancel and put in a new order, why not? Obviously we're in very different areas, I used to live in Connecticut and I was there recently and it's hardly any superchargers, I am now in La where there is a supercharger everywhere. Literally I can go get lunch and supercharged if I want 5 min from my house.