As quoted from the linked post.
It looks like you’re part of one of our experiments. The logged-in mobile web experience is currently unavailable for a portion of users. To access the site you can log on via desktop, the mobile apps, or wait for the experiment to conclude.
This is separate from the API issue. This will actually BLOCK you from even viewing reddit on your phone without using the official app.
Archive.org link in case the post is removed.
I use Safari on my Mac, and Google is just about as bad.
If I open the Gmail site on my iPhone in Safari, I have to click past a giant “INSTALL GMAIL APP” button to get to the teeny-tiny (no thanks, continue on mobile web) link.
That said, I use Chrome on my Windows PC and Edge is frickin’ annoying. It’s like when you go to a car lot just to look, and the doofus in khakis and a polo won’t let you walk around in peace.