An ad platform finds out about your sale within seconds. It never finds out about the refund three weeks later.
That gap is where a lot of bad budget decisions live. The order comes back, the customer is made whole, the marketplace hands back its commission, the courier bills you twice and the item goes back on the shelf at a discount if it can be resold at all. One thing does not come back. The money you spent acquiring that order. You paid full price for a sale that unhappened, and the platform is still counting it as a win in a dashboard somebody will read on Monday.
For most shops this is a rounding error worth knowing about. For anyone selling clothing, footwear or anything where people buy three to keep one, it is the whole ballgame, and it can quite easily invert your channel ranking.
Picture two channels with identical reported returns on ad spend. One sells the reliable thing people buy on purpose. The other sells the fashion line that goes out in threes and comes back in twos. The platforms will report these as equally good. Your bank account will not agree, and the report nobody adjusts is the one that decides where next month’s budget goes.
The fix is unglamorous and takes an afternoon. Pull your return rate by channel, not just overall, because the overall figure hides exactly the variation you need. Apply it to reported revenue per channel. Rank again. If the order changes, you have been funding the wrong thing, possibly for a long time.
Then do it by category as well, because the effect concentrates. Two or three product lines usually carry most of the returns, and the honest conclusion is sometimes that a category should not be advertised at all rather than advertised more cleverly.
None of this requires new software. It requires joining two numbers you already have and being willing to dislike the answer.
A return is not a customer service event. It is an advertising cost that arrives late, gets filed somewhere else, and never makes it back to the report that spends the money.
If this is the exact wall you are staring at, tell me what you are seeing: mail@sandeepkv.com, or message me on LinkedIn.