"Of course not. That's why there haven't been any revivals of:
CANDIDE (twice)
FOLLIES
LITTLE ME (twice)
11O IN THE SHADE
PACIFIC OVERTURES (twice)
SHE LOVES ME
SUNDAY IN THE PARK WITH GEORGE
ZORBA
and a rumored MERRILY WE ROLL ALONG"
Of course, a number of flop musicals have been revived commercially and a few of them have been commercial successes in revival, though I think most were financial failures in revival as well. And a number were revived by nonprofits with varying degrees of success.
Btw, the original production of
110 in the Shade did pay off during the post-Broadway tour so
Variety classified it as a hit.
One difference between the shows mentioned above and
Subways Are For Sleeping is that the show's authors didn't think it was a good show. And that may be why it was never licensed. I think the most we can hope for is an Encores! or Musicals in Mufti presentation.
A thread on flops that have been revived can be found at
https://forum.broadwayworld.com/readmessage.cfm?thread=972257#3626745