How do I rotate to a new offer without losing my optimization data?

How do I rotate to a new offer without losing my optimization data?
Q: Current offer is fading. How do I swap in a new one cleanly?

A: Don't rip and replace. Transition:
— Clone your best campaign, point the clone at the new offer, keep the old one live as control.
— Carry over winning angles and audiences first — they're your validated assets, separate from the offer.
— Split traffic gradually: 80/20 old/new, then shift as the new offer proves out.
— Log baseline metrics for the new offer separately; don't blend them with old numbers.
— Only kill the old offer once the new one beats it on EPC over a full cycle, not one good day.

Short version: clone, keep old as control, reuse winning angles, ramp traffic 80/20 to new, switch only after a full-cycle EPC win.

More Qs? Drop them.