Once recruiters figured out that placing these under qualified people into jobs was not a good thing, the bootcamps started to train people how to fake their resumes. Just like how people figured out that if they want a specific job, they only need to update their resume to include all the keywords in the job description.
When I was hiring and screening hundreds of people, applications would show 'projects' completed on them as if they were real work. Hired.com was full of this for a while until they started blocking them there too. People would go so far as to make a domain name for a class project appear as if it was a real company. You'd go look at their github and realize they only made a few commits towards the 'project'. How is that a demonstration of skill?
I'm sure a few people have come out of these bootcamps with some real knowledge and skills. But this is the edge case, not the norm. You can't shortcut your way to a well paying software engineering career by spending a ton of money.