I disagree. Given payments have already been made in advance for the service, cutting off service now means instant and super profit for the servers - essentially they have had all the revenue, but no more cost. If they are shutting down the service, which is still live, they should refund the fees pro rata.
What has changed, is no more future business for sly cs - which was never guaranteed for the servers, and therefore was always a business risk they took, just like sly or vm closing the door is a risk everybody took. It might take effort, but there is no reason for their cost (of running the sly server business) couldn't be managed down progressively as sly subscriptions expire (unless and until all sly channels go dark), and indeed I wouldn't be surprise that many if not all of them can now redeploy time and resource to and profit from increased cable and iptv business. But to cut off sat service, when it is not dead, when people have paid good money for in good faith, is a behaviour in my view the mods should help deter (by name, shame and if possible banned). If such bar stewards are happy do it to sly line customers, what is to say they would not cut and run when they supply your iptv or cable lines?