My experience with Witnesses far and wide is that they ARE some of the cheapest, stingiest people. Especially in America. Wether they are window washers or have money. They are not generous. In other countries they may be, but some other countries generosity is cultural as well.
My wife is really beginning to see this too, how the majority of RF from young adult to middle aged are generally inhospitable, ungenerous, and ungrateful to those who actually are, in fact they may resent you! This has been my over all impression, and she is starting to see it.
Maybe this is a deflection of Lett's part, to soften up his message a little and make it seem like they are asking for general openhandedness