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.
A/B testing is cheaper than hiring real testers
Absolutely and frankly I’d be perfectly fine with A/B testing if it was opt-in. Pop up a little window or notification that says “Hey, this is a new feature, you want it?”
If
You know the feature isn’t good and to move on. A lot of people would call that data inconclusive because they want to believe the feature is good but not being able to convince people to opt-in is feedback.
Experimenting on users should be illegal.