I wouldn't expect it for a year or more and maybe never. I think channels which are part of a package (i.e., the other hallmark channels) are not "sold" individually and thus wouldn't come up for availability until contract re-negotiation time. Since I think the contract was up for renegotiation around last November 2017 (look here near the end) I don't think this channel wouldn't come up for discussion until the current contract expires.
This is a public forum and I am a customer just like you. Click kudo if you feel this post is helpful and "Accept as Solution" if it solves your problem.
Award for Community Excellence 2019 Achiever* *The views and opinions expressed on this forum are purely my own. Any product claim, statistic, quote, or other representation about a product or service should be verified with the manufacturer, provider, or party.