Ah yes, the calling card of people that think systematic exploitation of workers in a global economy where only the top few are gaining wealth is fine because "free market rules" matter in a world full of regulatory capture and industries with too high of a barrier to entry to foster true competition.
Actually that's exactly what the article is about. Amazon has already had their own delivery drivers for a long time, they are now directly competing with UPS and FedEx by shipping packages for businesses that don't operate on Amazon's eCommerce platform.
If Amazon loses money on each delivery to stoke its market share, Walmart should use it as its delivery service until Amazon has exhausted its foray into last mile logistics.
Note -- you said tip. And I imagine you tip if you got at least acceptable service (something that looking at comments here doesn't happen too often with AMZL).
Ah yes, the calling card of people that think systematic exploitation of workers in a global economy where only the top few are gaining wealth is fine because "free market rules" matter in a world full of regulatory capture and industries with too high of a barrier to entry to foster true competition.