I can throw out a number based on crude data. I wouldn't take it too seriously though.The first modelling I did was for 10K .....then we assumed in this forum what if the count was 30K. Rivian's lack of publicly stating the #s is making us take an educated guess with the sampling we have. If anyone gets any data on the # of pre-orders, plz post it and we can re-run the numbers.
Tesla has let slip enough information to suggest that their reservations number for the CT is around 750000. The Cybertruck Owners Club forum lists 6843 registered members. Thus, apparently, one out of every 110 people who reserves a CT is excited enough about it to join a forum exclusively devoted to discussing it. Assuming that those who reserve a Rivian are equally inclined to go online about it and given that this forum has 1145 registered members we can calculate that Rivian has 750000*1145/6843 = 125493 pre orders.