I'm not sure it's so clear. "Using private data" to set prices is hardly nefarious on its own, even if the result is higher prices. After all, "price stickiness" is a well known phenomena in the economics literature (and it can lead to sub-optimal allocation of resources). Maybe this is just a way to make prices less sticky.

On the other hand, if the system recommends keeping units vacant, that does start to suggest that it is enabling landowners to take advantage of monopolistic pricing power. Yet higher vacancy rates could actually be socially optimal as well. A similar phenomena occurs in the movie theater business. Theater owners often price tickets such that the "vacancy" rates (empty seats) are quite high. However, a law that required pricing tickets low enough to fill all seats would reduce the return on equity in the industry so much that investment in the theater industry would plummet, vastly reducing the number of theater seats available available to fill consumer demand in the medium to long term.