tl;dr: Anyone can sign up for production now — a Stripe subscription is the only ticket you need, and the old email invite-list has left the building.
The front door is open. Production signup no longer runs through an email whitelist — if you've got an active subscription, you're in. Access control moved to where it belongs: your plan. No more waiting for an address to land on an approved list before you can log in or accept an invite.
Under the hood, the whitelist gate became a per-environment switch. Production flips it off so real customers can walk in; staging keeps it on, still bolted shut for the folks kicking the tires. One toggle, both behaviors — login and invitations honor the same setting, so there's no drift between how you sign in and how you invite a teammate.
By default the gate stays closed, which means nothing opens by accident — an environment only lets everyone in when it's explicitly told to. Practically speaking: production is now genuinely self-serve, and inviting your team no longer means checking whether their email made the cut.
Subscribe, sign in, get to work. That's the whole flow now.