Merchant Archive
Thread: Are we sure the Ad tree wasnt intended to be reset every day???
As near as I can tell, your question seems to be based on the assumption that the advertising charges you once when you register. Hence why have a skillbox to reduce that price if you stay registered forever. But that isn't how it works. It raises the maintence of the vendor rather than charging a set fee, so in essence, charges continously all the time you're registered. The longer you're registered, the more you'll pay. The registering/unregistering bit doesn't effect the price.
Part of the bug in it currently is it continues to charge the increased maintence cost the next day, even though you aren't on the map.
Of course, it's easy not to know that, as for NPCs it currently makes no difference. But if you register a terminal or a droid, you can see the maintainence rising.