Occasionally, a user will receive an account invitation without a registration link.
If it looks like this:

The user has access to another account
If a user whose email address is already associated with an InsightStore account is invited to join a new organization, the new organization's account permissions are added to that user's account. The user accesses it by switching accounts.
There is no registration link in the emailed invitation, as no registration is required.
A media partner doesn't have a signed contract
If the organization is a media partner, our database may not yet reflect a signed contract. If a user without contract-signing privileges is added to the account, a different flow will be used for that user.