They haven't reset the counter in over a year, so they just keep adding up. I'm in the same boat as you. Previous cycle I got 3 referrals back when that earned you a set of Arachnids. Then they changed the program (without resetting the counter) and I got 2 more referrals around the same time you did. So another set of arachnids, and a Powerwall.I’m so confused. I have five referrals, two whom I don’t know or even had electronic contact. I gave away the first three prizes (2x kid Tesla and Arachnid wheels), but my loot box seems to show another set of Arachnids, a power wall (available 2019), and an invitation to a future event. Also, the 1st set of arachnids were definitely delivered, but the loot box says they’re still at the service center. I think Tesla is mistaken, but maybe I don’t understand the program. My 4th and 5th referrals were the end of August and September of 2018, while the first three were all in 2017. I thought those were different programs. Are the prizes cumulative?
Edit: I also got to the unlocked secret roadster level.
First set of arachnids never showed up, after 6 months I eventually talked to the service center and they have a set they can give me, even though it just says "processing" in my loot box.