Rather, if they're untradable over wi-fi, people had to go to event location to get them. This gives pokemon more publicity, and might make players more motivated to keep active on their game. Toys R Us Events > Wi-fi Events, in terms of rarity.
Why they waited this long, though, I don't know.
I find the WiFi convenient. Sit down at the beginning of each month, and just click search.
Speaking of which, I need to find my Platinum, Septembers coming up soon.
The Silence Bridge Guru