Rule-Lock: versioned, dated, never retroactive

Every rulebook change produces a new version number and a new effective date, published on the rules page before it applies to anyone. The version in force when you purchase an account governs that account for its entire life.

The two directions

• Loosening (trader-favorable) — may be extended to existing accounts, and when it is, that's announced with the change.
• Tightening — applies only to accounts purchased after the effective date. It never reaches backward. Zero retroactive changes to date, and that counter is printed on the rules page.

Why this exists

The quiet mid-stream rule edit is the oldest trick in this industry: sell an account under one rulebook, deny the payout under another. Rule-Lock makes that move structurally impossible here — and because the rulebook is public and dated, you can verify the claim rather than trust it.

The full changelog — every version, every diff, every date — is published on the transparency page.