Autodesk has laid off about a quarter of its workforce in the past two years. Crytek has had employees regularly complaining about paychecks bouncing; they're clearly inches from bankruptcy. Havok is owned by Microsoft; I'm not sure how they're doing. Unity is probably doing well enough, as they're incredibly popular, but I suspect popularity among hobbyists translates mostly into a lot of people on the free tier.

The tooling market is hard.

I can tell you right here and right now that I know that some of the companies you name do not make a bank off of their products. And it's probably not the companies you would expect and not for the reasons you would expect. I have sources for this, but unfortunately I cannot name them.

Can you tell us which companies and the reasons? Otherwise, it’s hard to learn from your comment.

I'm pretty sure that Crytek has nearly gone under a few year ago, so they're not exactly making a bank with their engine. Rgarding their engine I've heard it's more difficult to use compared to other engines, which has slowed down adoption.

You may be surprised where unity makes the majority of their money... it's not from sales to the general public. The parent post is correct, the majority of users are cheap, it's a race to the bottom, where a £50 plugin is considered expensive.