Must carry only applies to the main channel. The subchannels would have to be negociated for cable carriage (whatever it might be). Though Allentown is far from Philadelphia, they have Retro TV, while on Monday, Polnet Communications dropped Retro TV from their LPTV station, & is no longer available in the Chicago market. Polnet was the only company that showed interest in the network in Chicago, but the fact the programming is reduced to mostly public domain programming, means that no one really wants to carry Retro TV. Polnet might be looking to dropping Tuff TV & TNN from their station as well, since they seem to want to focus more on networks for Korean & Chinese speaking viewers (besides serving their own viewers who speak Polish with Polvision). I won't be surprised if WFMZ drops Retro TV when their affiliation agreement is up. They probably want to drop the network, but can't until the contract is up. That's probably why WFMZ never negociated for the network to be on cable.