Recent article on this [1], because I must admit that for me also this was a tough thing to believe.
[1] https://www.businessinsider.com/alibaba-founder-jack-ma-susp...
You live in the time where there's massive outrage for one week, but the next week that's the subject of the past that lost hype and momentum so it's forgotten.
I think the CCP knows this, hell even political leaders of the free world know this - no one resigns due to scandals anymore. They just sit tight, don't acknowledge it, and it blows over.
Are people that normally see him also reporting him missing? Or other events he had to cancel lately?
Or when the media reported Dr. Ai Fen (one of the first to identify COVID-19) was “missing,” but less than a week later she posting on Weibo and back at work.
Once Jack Ma is found, I wonder who will be the next person the media claims is missing?
No one knows what happened to him, in my opinion I doubt they killed him simply because he was in China. What's the point of killing him there? They can simply remove him from the picture.