There is no sign up.
This one is AAR's.

AAR Business Center is not a product with users — it is one operator's engine, running on one account, grading one strategy.

• Closed by design

  Public sign-ups are disabled at the auth provider, not just hidden in the UI.

• One operator

  The schema, the weights and the history all belong to a single trading account.

• No tenants, no seats

  There is no team plan, no invite flow, and nothing to upgrade to.