From the terms and conditions:

The promotion provides new customers who are currently on the ASX beta waitlist with two free US-listed stocks when they fund their Stake account using payment methods provided by Stake within Stake’s platform.

This promotion allows for registered Stake users (a “Stake user”) to receive two free shares for their first funding.

Eligibility Criteria

In order to qualify for this you must meet all of the following:

• Does not have an existing funded individual or non-individual (Company, SMSF) Stake account before 2:30 pm AEST on 23rd September 2021.
• Currently have a valid email registered on the Stake ASX beta waitlist.
• Uses the promotional code BETA when creating their new Stake account.
• Fund their account within 24 hours or a time limit set by Stake of first viewing the Portfolio/Dashboard page after completion of creating their account on the Stake App and/or Website.