One place laid everyone off, in the job hunt after that I found job ads from the same company, for my own role, for enough less than I earned that the ad had to have been many years out of date.

As everyone was laid off, nobody inside to contact. Messaged the (by this point former) CTO on LinkedIn, was a surprise to him too.

Many places post job ads, but they don't really look for anyone, they just need CVs in case they'll need someone in the future. Waste of time.