Yes KISS OF THE SPIDER WOMAN lost money in its Broadway run. So did RAGTIME, INTO THE WOODS and other shows that ran 2 years or more.
The financial status of a show matters only to the investors.
I have yet to meet anyone who refuses to go see a production of a show simply because it finished its Broadway run in the red.
These days with shows costing so much to open, it is possible for a show to run for many months meeting its weekly nut but without making any significant return on its production costs. But that has nothing to do with the long-term popularity of the show. The only real measure is how often do regional, professional and amateur companies revive the show.
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