This. Amazon made a number of changes to the Fulfillment by Amazon (FBA) program related to lost and damaged inventory among other things. The changes risked increasing the costs and also required Amazon to be provided information that they really shouldn’t need, such as as the cost to source that inventory.

My assumption is that the decision to stop commingling is more to support these changes to the FBA program and allow them to extract more money via fees.

https://www.ecommercebytes.com/2024/12/22/amazon-drops-bombs...