When inviting InvitesBot to a new server, it will send you this private message:
InvitesBot BOTtoday at 4:20 PM
Welcome to the InvitesBot!
InvitesBot can track where users join from with amazing accuracy. It is one of, if not the only, bot that can track if users joined from a vanity URL, all kinds of invites (including temporary invites, even one-use invites), and server discovery. There are also miscellaneous other invite-based commands to help you obtain more information about an invite.
Being able to know where users are joining from can have a variety of uses, such as measuring the effectiveness of join sources, stopping raids, connecting main accounts to alternate accounts, and much more.