"…that indicates any preference, limitation, or discrimination…"
If the ad itself does not mention the preference, then it does not seem to be covered by this clause.
Would it not be analogous to advertising the property to a particular racial or religious group, such as a church bulletin board?
The distribution of the ad is being targeted, but the ad itself does not indicate any preference. It seems as if the latter is the only thing that is deemed illegal by the law.
Am I reading it correctly?