In this case, though, I believe that's less of a factor than it might at first appear. Regardless of the theatre involved, Password, IGAS, TTTT & (occasionally) WML were **all** pre-taped, yet 40 years later, the only program to have been preserved in its original format is Password. Since it simply can't be a coincidence that almost the entire run of that show was saved, while only 2 episodes out of the entire runs of the other three programs still exist (and at least one of those was accidental), there had to be a different sort of preservation agreement in place for Password.
With regard to a couple of other points that have been brought up, the oldest surviving daytime Password I've been able to locate so far is from 9/65 (with the Smothers Brothers), and is held by UCLA.
With the daytime TTTT's though, there are about 500 surviving daytime eps, with about 375 of those in color (spring '67 to 9/68). Plenty enough to syndicate, even if the B&W ones were excluded. The reason they never did that though, was the fact that WML did so well as a 5-a-week syndie, that they were able to sell the new Garry Moore TTTT version for 1969, without having to dip into the vault for syndication (a la Password).
-Kevin