Job Bait and Switch

I was offered a job (funny enough through hacker news) only to be ghosted by the person hiring me. It's a soul crushing experience, and now I'm back in square one. I'm seeing this happen more on my social feeds, even a couple FANG companies have been receding offers. How common is this, and what can I do about it? (not really sure if HN is meant for this kind of conversations but I am interested in what this crowd would think)