While it is strange that a mailer would go out WITHOUT an official announcement, if you look at the grosses and you know that historically January and February are slow months it isn't to surprising
What is surprising in a good way is that a piece of serious musical theatre has managed a long and profitable run. It is a flawed piece, but it tried so hard to achieve so much more than most musicals these days, its shortcomings should not be held against it.
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