Homeless people do not have computers to log on to JW.Org, nor do they have money to donate to WT's real estate ventures. Giving them a tract, despite it's so-called purpose of guiding them to "truth" and "everlasting life", is a waste of WT resources.
It's interesting that you say that, our last CO gave a talk (and I suspect everyone else who went got the same talk) about not being prejudiced, and we should preach to everyone. The material that he seemed to talk about from the outline seemed to be mostly about race/hobbies/etc. but the little bit of personal 'color' that the CO added was a personal experience involving a homeless guy, that basically ended with him saying that we need to be sure to preach even to the homeless.
It's a funny situation when the official policies (preach to everyone) of the cult start to go against it's unofficial goals (make money). I wonder if there will be a WT article encouraging people to consider the mental health of those who they preach to, or to acknowledge that some people are too far gone as a way of discouraging JWs from witnessing to the homeless that will do nothing but leach the WTS's money (as they see it) from the congregation.
I guess if they're just going to transition to ineffectual tracts that direct people to a website, that completely solves the problem of preaching to the homeless, too.