Winning lottery doesn’t mean you can live in the US. From my experience, visas were limited and some lottery winners were also rejected. I knew three people were rejected after their interviews and I was the only one among 4 of us who got a visa. We were friends in college and we had interviews in the same month. All of those three guys were rejected and I was in a consideration, which meant they still needed to review my case. It took 4 months until the US embassy called me and said “congratulations.”