Traditionally the art dept uses Bethelites, friends or family of bethelites or 'well-reported upon' youth and families.
I personally never made the cover but...
I was on the back page of the Awake in the early to mid 90's. An artist's rendering of me and my full name was used. It was highly unusual at the time since they rarely if ever used names (preferring to use initials only) even when relating experiences. I guess they figured 10 years of Bethel service/an elder he's okay. 4 years later I disappeared from the ranks of the JW's. (yay me!)
At the time it was the closest thing I ever thought I would be to being famous. That experience was related at every Canadian District and Circuit assembly for at least a year after it came out. In the highly competitive world of Bethel guys, the attention the article received pissed off a lot of those more senior to me at the big house.
Despite the not so flattering artist's rendering, I received over 40 letters from sisters around the world wanting to know if I was single and available. We admire those who cultivate the spirit of singleness for Jehovah but as a dedicated sister I can't help but be attracted to someone who is so obviously devoted to Jehovah with such a kind heart..." Sad eh? It is a statement of the desperation some of the JW women feel.
Too bad I was still such a loyal Dub, I could have done well for myself