It's not the plugin team's job to make sure that plugin devs know and follow FTC rules. That's the developer's job. It seems to me well within the .org rights to take something down that's not following those rules. And, it's not like it was down forever. The dev was told about the issue, corrected it, and now it's back up again. Maybe a link to the FTC rules in the plugin guidelines would be appropriate, but they shouldn't have to spell out things that are already clear there.