I remember a few kids from NYC in the summer, but few made it back for the regular year. I think there was a lot of pressure on their families to come up with the cash from other sources than Hyde, and that wasn't always possible. Whether or not Hyde gave them a scholarship depended a lot on their "attitude," and only bona fide converts qualified for that no matter how badly they might want to come for other reasons.
But I'm probably not the most accurate source to cite for that; as I mentioned earlier, I was a bit obtuse to that kind of info at the time. And I must also say, the whole "Brother's Keeper" concept gave me the willies, so much so that it sorely dampened my friendships. I figured I wouldn't need to say anything about anything I didn't know about, and that accentuated my innate shyness to an even greater degree than it had been to begin with.
Faculty kids always got scholarships and that was a most compelling reason to continue teaching there for certainly some of the faculty. When the kid left, so did the parents. Although I can remember one case in which it was not clear who left first, the parent or the kid! Ha!
Email me or PM me about when I was there, the address is in my profile.