I haven't told that they shouldn't sell pack, but they told that the new cards don't come befor July 2023, so why to burn all remaining chaos legion packs in march, when it will take at least four month more till new packs come out.
You saw that with the end-of-year-promotion they get a lot of interest and in May 2023 splinterlands will have his 5th birthday, why not make a very good promotion with chaos legion packs for this ?
If they also think to the smaller accounts and offer also smaller package who are attractive I think they would have good success.