I was the EM for Reddit's Growth team around this time. I am responsible for / contributed to a few features like the current signup flow, AMP pages, push notifications, email digests, app download interstitials, etc.
There was a new product lead who joined with many good ideas, but some of them were dark patterns that I heavily protested. After a few months of this, it was obvious that I was going to be reigned in or let go[0]; I immediately transferred to a different org.
Now let me explain the other side of the story. 4 years later, Reddit's DAU, MAU, and revenue have all grown at ridiculous rates[1]. Yes, power users complain—and still continue using the site—but the casual user does not. These dark patterns have been normalized on other websites.
These practices are done because it works.
_____
0: They changed it so I would report to the product lead, which is odd for an EM to report into a product chain and the only instance within the company ever.
1: Many friends are startup founders and I've been at a few startups myself—a byproduct of being in the Bay Area—and Reddit's growth numbers are impressive. As a former employee, I am quite happy about my equity growth.