Every edition lists its one-time, non-renewing benefits before payment. Higher editions include the eligible capabilities below them, while signed-in owners see the exact difference between their current edition and the next one before confirming an upgrade.
The steep jumps are deliberate. They separate a personal purchase from Society circles and assisted Host or Institution work, whose deliverables and acceptance criteria are agreed before payment.
A dramatic price ladder still needs excellent handrails.Compare the six editions