A confirmation will be sent to the primary email address in your BlockFi profile once you successfully join the waitlist.
You can also confirm that you are on the BlockFi Bitcoin Rewards Card waitlist, by logging in to app.blockfi.com. Click through the promotional banner at the top of the page. If you are redirected to a page that says, “You’re on the list!” then you’re all set. If you are redirected to a page that invites you to join the list, click “Get on the list” to join. Once you join the waitlist, you'll receive a confirmation email.