Yes, if I go to Slackbot we get this: https://pbs.twimg.com/media/HCowV2GXsAAmpXN?format=jpg&name=... - there's no X and no way to get rid of it. Just an ad for their pro plan every time. This is on whatever the normal paid plan is. (We're keeping it around for a few months before we cancel to see if we need to go back on there to find things.)