Having had 2 boys in the full time program and the camps, I can assure the rest of the posters that what PB says about scholarships or the draft are incorrect.
There are players who are drafted from the full time high school program each year. As an example, a New Jersey kid who is very talented came on scholarship this year, for his Senior year of high school, and was drafted. Perhaps the poster PB knows this young man...very talented.
There are a few scholarship players each year. Much like the young man mentioned above, these players typically are Senior year only players. Sometimes a junior will come and do two years. My oldest sons team had 3 players drafted, 2 were senior year only players on scholarship, 1 had come the previous year and was also on scholarship. The varsity team my sons year had 25 players, most of whom saw no playing time in the high school games, they only played intra squad vs. the PG or jv teams.
IMG is a for profit company and not your typical high school. A one year tuition and sports fees plus room and board and any extras, e.g., individual training, SAT prep, physical therapy, etc. will run over $75K per student. Many parents are happy to pay this as they foresee the next Barry Bonds, Andre Agassi, et.al. Some parents just want the kids away from home.
The high school wood bat league is a non-refundable $7999 for 6 weeks. You can also purchase optional individualized things like upgraded housing, personal instruction, SAT prep, etc. but these will significantly raise the cost. Travel expenses to and from IMG in Bradenton, FL are also your responsibility.
I can only speak for my family, but paying $8K or more for 6 weeks of baseball is way more than I'm spending this 11 week Summer season doing it a la carte. We have a top 17U travel team playing 30 plus games that we travel to see, 3 weekly team practices, a few hours of weekly private instruction, 4 hours of weekly ACT prep, 2 hours of strength and speed work weekly, and my son goes to church youth group on Sundays, and works part time job weekday mornings to make money for himself and his expenses.