Not the usual spin on Yehudah and Tamar
This is exactly the same kind of game played by some people I call to inquire about advertising. The one who say, "not now, but you could call me for the next one" never do come in for the "next one." They just think it is more polite to say this then to say, no. But they are still being less than honest and wasting my time when I do try to follow up for the next one. Politeness does not trump honesty when it raises false hopes, as we see from the pshat offered by Hakthav vehakabala.