Wasn't one of their initial monetization ideas that crowdsourced translations - from amateurs, not even paid contractors - would outperform AI translation? The translation thing never came close to panning out, from what I can tell.
Back in the day you used to be able to see a mini discussion thread about any exercise. The comments in these threads - from unpaid users - were frequently much more helpful than the official teaching notes. But they got rid of those a while back, too. At the time people suggested it was because they wanted to push people into some sort of paid tutoring offering that they'd announced. But I don't see any hint of that around. Now I'd guess it's because the questions are no longer hand crafted by people, and are now autogenerated by AI, leading to an inability to have discussions about specific questions.
Back in the day you used to be able to see a mini discussion thread about any exercise. The comments in these threads - from unpaid users - were frequently much more helpful than the official teaching notes. But they got rid of those a while back, too. At the time people suggested it was because they wanted to push people into some sort of paid tutoring offering that they'd announced. But I don't see any hint of that around. Now I'd guess it's because the questions are no longer hand crafted by people, and are now autogenerated by AI, leading to an inability to have discussions about specific questions.