When a saved item changes
A saved item that sells out can offer the waiting list, and one that gets cheaper can say so - each with its own consent rule.
Last updated July 28, 2026
A wishlist is a list of things that keep changing. Two of those changes are worth telling someone about, and they are the only reasons anyone is ever written to about something they saved.
It sold out
A saved item that is no longer buyable swaps its “Add to cart” button for “Notify me”. It is the same waiting list the Back in Stock button feeds, so one shopper waiting for one size is one entry however they got there - and they hear the moment it returns, on the rules you already set.
This needs both add-ons. Without Back in Stock there is no waiting list to offer, so the card says “Sold out” and stops there - which is still better than an “Add to cart” button that fails at the cart.
It got cheaper
Off by default, and turning it on is not enough on its own: each shopper still has to tick their own box and leave an address on the wishlist page. Saving something is not asking to be emailed about it, and treating a tap on a heart as consent is how a wishlist becomes a list people stop using.
Only real drops are sent - at least 5% and at least one unit of currency - so a rounding change, a currency conversion or a corrected typo is not an email. And one alert per item per fortnight, whatever else you do to the price in between: a price that drifts around a threshold would otherwise write to the same shopper every time it crossed.
Why the two rules differ
Telling someone the thing they explicitly asked to hear about is back is transactional - they requested it, about one item. Telling someone that something they merely saved is now cheaper is marketing: they never asked. Same app, same shopper, two different questions - so two different answers.