This case reads like a single individual suing these companies

What is to stop other individuals from filing the same suit and expecting similar outcomes?

It is a bellwether trial, a test of sorts combining hundreds of similar cases. See https://en.wikipedia.org/wiki/Bellwether_trial

This is the first of many lawsuits that was exactly the same.

Not much.

Class action suites suffer immensely from bad actors freeloading on the backs of people actually harmed. I have a friend who practices law in the area on some pretty high profile medical cases, it's a chronic problem trying to weed out people who were affected from people who shamelessly want money. Basically people playing victim to steal from actual victims, and even worse, the side doing the weeding is the side who originated the harm.

I hope nothing. Maybe if enough people rightfully sue, then these companies will be forced into going out of business since we can't put the executives away for the crimes.