Not decided if you want to plunk down a C-note to reserve an Aptera? Would $70 make it more interesting to you? If so, just ask anyone who's already placed a reservation for their "referral code"!
(Notice that I said ANY reservation holder - not just me! I'm humble like that...😁)
It seems that the referral system works only when the code is sent to an email address, not when it is shared in the Forums as a link. It also works best if the person attempting to use the code has not yet created an Aptera account.