There are actual “Processing Specialization” company whose expertise is in getting these visas approved, how to ‘set up’ the requirements, pitfalls, tricks of the trade, etc.
They give free seminars to employers to drum up business and the whole point is to subvert the intent of the program and increase the particular company’s bottom line.
They are the equivalent of disgusting ‘immigration’ lawyers here.
One widely used trick is to have a long list of obscure skills required for the job, which magically only the foreign worker's resume will fulfill. If you see a job listing with all sorts of odd requirements, just understand that they've already picked the H1B that they want to fill it, and don't waste your time.