Thanks @pfaffman!
Yes, great reminder that we can use a CSV for bulk invite (and it’s good that emails are restricted) but this means only one custom email message will be sent; however, we would like to use the custom invite link so that we can add the link in the different email campaigns that we send. Which also means one invitation link per email is not helpful in a large campaign.
If one invite link can be used to a group of emails then the difference in the process is that they will have to enter their email address and if the email address is found in the group the process continues, account created, user added to group, and then redirected to topic post (if email is not found in the group, then the invitation work doesn’t work).
Thanks!