I can now report on what happens if someone signs up using your referral link when you don't have any coupons.
Graham Frame has done a great job with handling this potentially troublesome situation.
It happened to me the other day because there was a sudden burst of sign ups using my link.
My two free coupons were quickly used, so the next person to join did not get the free upgrade to Believer level.
What could I do?
Luckily, Graham has given us a pay-it-forward system. So, after a little deliberation, I just sent the unlucky referral $2 from my Accumulated Cash Wallet.
I did not have to wait for the referral to manually upgrade - the system automatically upgraded him/her, AND straightway gave me a $2 commission.
Bingo! I had not lost anything and the whole thing was done instantly.
Thanks to Graham and all concerned.