Yeah, using a "mule" can help you get many magic pins.
For example: I traded my invisibility magic pin for a rare piece of furniture. Then, I logged onto my mule, and played the Pirates game until I got invisibility magic. After that, I opened up straight to the log in page from another browser, logged in to my main account, met up with my mule, and traded. Plus, I got a lot extra ice chairs from my mule as well. I used the same technique to get five star fireworks magic.
