I am curious if we'll find any actual evidence for TP-Link selling at a loss. Their devices are widely used due to their low cost even outside of the US.
And at least from the devices I've encountered, the price seemed to have reflected the product offering. You can find similar devices from competitors at somewhat comparable prices, but it would be reasonable to expect TP-Link to be better positioned in terms of pricing (on a relative basis for the "baseline" segment) considering they benefit from scale.