Since targeted ads got so cheap, tiny little businesses could buy super targeted social media ads for less money than they could selling their products wholesale at a store. Net result is that they can flood social media with targeted ads for some geoarbitraged thing that tiny startup found on AliExpress decided to sell DTC, and end run around consumer wholesaling and all rigamarole involved there.
The barrier to entry for that is super low. All you really need to be good at then is matchmaking some real niche product you found on Alibaba to a real niche consumer need.
Net result: lower prices, greater net profit for the company, tons of new entries to the game of social media enabled DTC.