When the user activates cashback on the store's website, some cookies set certain values. With the help of such cookies, the store knows who will get the lead while purchasing. This means that
if someone rewrote this activation, then the activation cookie values will be changed.
Accordingly, the store will not give the order to the affiliate network, and it, in turn, will not deliver the order to the customer, and the user will not receive his cashback. And all because of the
'last cookie wins' rule.
But what we can do is to track these cookie values: trace them when going to the advertiser's website through an activation link and throughout the whole user's shopping trip. Thereby,
we are able to take all necessary actions in case of changes (e.g. reset the activation).
Please note, that
each store has its own set of cookies and their values. This means that a configuration file should be written for every single tracked store.
However, there is another option which is simpler - to view click-throughs on affiliate links. But it has some drawbacks.