It must be calculated according to the transaction amount, and the refund rate must also be included! Other than that, no matter which algorithm is used, it is a pitfall.

If the operation does not run the store well, the store is not profitable, and it is useless to make the data look good. Some agents will brush orders for the store, and the brushed-in users are all low-quality users, which makes it very difficult to operate in the later stage! In serious cases, the store may be closed, so choose carefully~