I am looking for a tool or extension like camelcamelcamel which tracks percentage return history for various retailers over time to see if there are any patterns which might help with a buying decision.
I realise this wouldn't be useful all the time but when buying a larger ticket item, it would be good to check if one of the rewards mobs were likely to be only days away from a having a larger percentage reward with a retailer than is usual based on historical data.
Anyway, does the camelcamelcamel version of cashrewards/topcashback/shopback exist?
Edit: Feeling rather sheepish that I didn't know the CTS links had history lists. I'm an idiot.
Expected value = possible CB% x probability of CB payout
Please check the forums re "probability of CB payout" before making big purchases on the basis of biggest possible CB%.