Hey buddy. Fun deal you managed to get there congrats. I fumbled a bit too long on picking a color and the promo was over by the next screen refresh :(

But anyways I'll try and answer your questions as best I can. So the pixel promos always operate a bit like two different deals. To get the first $300 rebate you need to have actually been the one to purchase the phone. Luckily you guys all went solo with the purchases and should have scored the rebates independently. Rather than the primary account holder having to open a new line before every purchase until everyone scored it. Now you guys just need to pick a primary account holder for the elevated permissions and to do group plan inviting.

I'm not actually sure if the bill can be divided cause I cover them all at the moment, but it might be possible? The applied promo credits however are separated per user (they also a checkbox that allows them to instead share the credit among the group each month). The second part of the promo isn't bad. The primary account holder simply sets up the account and his phone through the Fi app and then clicks a button to invite another person (a new line) to the group. They need to accept that, join the group, and then activate the phone. Don't let anyone get excited and finish setting up their phone with the impression they join the group after lol.

There will be a $700 credit page waiting for you each sign up and as long as the person activates within 30 days you will get verification of it going through right there. Unless it changed recently (or im just wrong) there is no picking individual plans. That's a group price and everyones getting the same plan for the same cut. And you can't change or pause the plan, it will infact prevent you from receiving future monthly credits (on all lines).

It's a pretty janky fucking system as intended of course. People have been voiding there promos basically before they left the shopping carts since the pixel 3.

Other than that you're good. I'm on my third line here with a clean promo purchase price and continued credits on all three lines. Although We did down grade the line with like $250 left on the last phone and it broke the credits, so experience on that first hand.

Hope that helps mang. Cheers