Reddit Is Fun was the only way I browsed Reddit on mobile. The mobile app is crap and doesn't actually properly load posts. I get down a few scrolls and it ends like there isn't anything else to view.
Apollo (the premier iOS app for Reddit) is also shutting down. It'll make Reddit unusable on mobile, so therefore, why bother with desktop.
Driving away thousands or millions of customers is a curious strategy for preparing for IPO. Or if you prefer, "It's a bold strategy, Cotton. Let's see if it pays off for 'em."
It's absolutely wild how quickly they did this too. They could have given a couple months lead time for this to play out but they just decided to pull the rug out from under everyone and act like their hands are tied.