Originally Posted by Hippalus
The goal here is not to have ghosts and bats popping up all over Summoner's Rift all year round. It is a Harrowing/Shadow Isles promotion to add a new element to the event and help us understand how players like and use ward skins.
Well, to be quite honest, this does NOT seem to be your goal...
Otherwise you would not be able to buy a YEAR worth of ward skins.
Edit: That actually adds a new problem, that people might not KNOW these wards and be confused, because they're not used frequently in, let's say, 10 months from now...