High Fidelity only ran for what?...a week. Cry-Baby had to have made back a little more money than High Fidelity...considering it's run for 2+ months... So why not release it? Well as BK stated, the producers of HIGH FIDELITY put up the cash so they would have the recording to encourage stock and regional productions. (I haven’t seen or heard of any.)
As for CRY BABY no cast album has been recorded so there is nothing to release. There is a 22-track demo, which sounds like a full cast album but only half of the songs on there made the final show.
The next question (I knew you were gonna ask) is why not release the demo. Because, to do that the cast and music rights would have to be paid, there are manufacturing costs, royalties to use graphics and pictures of the production etc. In short it's a lot of money for something that would sell maybe 1,000 copies if we were lucky.
Maybe if they charged $250 a copy but I suspect few would pay that much. Hell, there are many who balk at paying $15-20 for a CD choosing instead to get free downloads. That doesn't help pay for the recordings.
There are 462 musicals that have opened on Broadway that have made and released a cast album.
How many of those do YOU have?
Cast albums are NOT "soundtracks."
Live theatre does not use a "soundtrack." If it did, it wouldn't be live theatre!
I host a weekly one-hour radio program featuring cast album selections as well as songs by cabaret, jazz and theatre artists. The program, FRONT ROW CENTRE is heard Sundays 9 to 10 am and also Saturdays from 8 to 9 am (eastern times) on www.proudfm.com