Sucks that Verizon doesn't support it, but surely someone can make better use of it!
https://account.oneplus.net/invite/claim/5KTZ-MHAT-XEOZ-SQDF
EDIT: Made it easier than entering the actual URL.
https://account.oneplus.net/invite/claim/5KTZ-MHAT-XEOZ-SQDF
EDIT: Made it easier than entering the actual URL.