I'd been meaning to look this up: thanks for the reminder!
[i:1hcl8wks]Cassidy on Licensing[/i:1hcl8wks] (the Bible, as far as this stuff goes) says that licences are [i:1hcl8wks]per se[/i:1hcl8wks] unconditional. However, she also says that there's an unwritten obligation to trade, and there is precedent for the refusal of renewal of a licence if there's no trading happening, and especially if there seems to be no [i:1hcl8wks]intention[/i:1hcl8wks] of trading. The idea is to stop people from building up a licence bank while we all go thirsty.
It sounds to me like opening one token day a year should no more protect you from having your licence extinguished than opening no days, but I'm not surprised that it doesn't work like that.