Calling it fraud is stupid. They deliberately reduced the work that is required, allowing people to file applications easily and cheaply. They deliberately allow people to file multiple applications, that I have not seen a single legitimate employee file. This is all deliberate, not a loophole or fraud.

Also, it is stupid to call H1B a high-skilled visa when you hand it out via lotteries. I wonder if people consider winning powerball as a skill?

But to answer your question, many people filed 10-20 applications each through fake companies to get H1B. The H1b acceptance rate was down to 13% and more than half the applications were filed by people with multiple applications.

That's it and the reason a second lottery is being run.