This may not be well known, but it’s possible to set an alert with Cashbackmonitor to tell you when a shopping portal or a group of portals increases their rate to a given threshold. For example, you can set up to get an alert when any mileage shopping portal goes above 3x for Apple.com or you can set up an alert when the United portal goes above 3x at Apple.com.
You can have the alerts show up only in your Cashbackmonitor message box, or you can have them sent to your via email.
To use this feature you’ll need to create an account with Cashbackmonitor or else link your Facebook, Google, or Twitter account. Then, click on your name in the top–right and choose the Manage My Alerts tab. Then input which store you want to follow and which portal or group of portals you want to follow, and you’ll get an alert when there’s a trigger.
This is especially useful for someone who has a ton of purchases to make on a given site, and just waits for the right time to pounce, e.g. a contractor on Lowes.com. It’s also very helpful if you have an Amex/Chase Offer to use and are waiting for an increased portal to buy or if you have a large purchase to make and are waiting for the right time to buy.
Cashbackmonitor has some other useful features, including the Best Rate History which I use all the time. I’ve used the portal alerts in the past as well.