Does anyone have this browser extension installed? I have it and in researching an issue just learned that once you activate an offer you can use ANY card from any issuer and get the shopping rewards. It is kind of like of like other shopping portals but isn't a portal.

The mystery I have is I made an award stay at IHG and it triggered a credit based on a $500 purchase. Has anyone seen that? It may think that the purchase is the "value" of the stay. I have been looking through all my cards to make sure there is no fraudulent purchase on any of them and there isn't.

Anyone have insight?