It doesn't work that way. Imagine that USCIS receives a huge pile of envelopes. They then run a lottery to decide which envelopes to open. The opened envelopes

It doesn't work that way. Imagine that USCIS receives a huge pile of envelopes. They then run a lottery to decide which envelopes to open. The opened envelopes are then processed and the employer gets an ID for those cases. Only after ALL SELECTED cases were processed (some accpeted, some rejected, some pending more info), the closed envelopes are returned to the employer. This is why it takes months (4 in my case) to inform an applicant that he wasn't selected even though the lottery is the first stage of the process.