I have more time this morning.
First, America's Got Talent, is a Reality Show. It is a reality contest show. It is regulated by the FCC and rules governing TV contests. The added twist of "reality" makes shows like these a category all of it's own. Reality Shows depend on the TV viewers emotional reaction to a decision by the producers and or judges. This is not an athletic contest, with a set of guidelines established how a judge might choose one gymnast over another. It is very subjective.
To give you a bit of an idea how contestants a finally chosen for games. My brother in law auditioned for Jeopardy. He became a finalist, but was passed over because he did not look the part. The final decision (who makes it on the show, and who doesn't) is really a casting decision. The same for shows like American Idol and AGT.
I can answer many of your questions, but I am bound by a contract with he producers that restricts me from discussing intimate details of the show. I can talk about shows that are public domain. The show airing June 17 will be public domain after it airs. I can not talk about future episodes coming in the summer months.
Why did we decide to be on AGT? For the very simple reason Reality TV is the ONLY avenue available to variety artists, and other entertainers as well. AGT and American Idol is seen by over 13 million viewers every week. These numbers are huge! All this translates into been seen, hence adding to good old American capitalism, more career opportunities, more money and therefore more spending power..so I can spend all my money like George Bush instructed me. All for the good of the nation.