Isn't this like Costco requiring manufacturers to offer SKUs at Costco that are not sold anywhere else? Or mattress stores offering to match price knowing full well that the SKUs in their store are not sold elsewhere?

This policy feels like incentive enough for Chinese manufacturers to not build behind a single brand, so the policy will not apply. Materially the same product, different SKU under a different brand name.

Feels trivially easy to get around this policy.