There were many bannings on Sarlona last time around.
Bannings would be effective if they didn't always wait until the problem was already way out of hand. When I reported that the anniversary cards were going to be massively exploited while it was on Lam they kept deleting my posts without taking any action until I was more subtle about it - they left the post but still didn't take any action and released the anniversary cards knowing full well it was exploitable. They knew but didn't seem to care and didn't think it was important enough to delay the release.