1. Find H1B candidate you want to hire.
2. Write job requirements matching that candidate’s experience so well it’s very unlikely for anyone else to meet those requirements.
3. Advertise position to meet legal requirements and reject any candidates not exactly matching requirements.
4. Hire H1B candidate.
Later for serious candidates it got completely unpractical, because H1B lottery got too filled with companies mass hiring Indians, that no serious company will spend time on hiring you given they have 20-30% chance of actually being able to get you into US.
So now only H1B hiring you have is mass hiring, where company does not care if you or someone else gets through lottery, as long as they'll get their 20-30% of candidates through.