Pinopolis became Artland. I have no idea what the transition was like, but this pin might have been in development before the handover and then released by Artland. An example of a pin that was released under Artland, but was started under pinopolis is this one (I actually ordered it, paid for it and then it was cancelled):
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pinpics.com
I am sure the number is a pinopolis game number and has nothing to do with the edition size.
Actually, not the whole story.
Artland is the licensee for Disney pins and makes them under their name.
PinPics was a dealer of Artland pins for a while. Pulse Gallery UK is now the official dealer for Artland pins and acquired the majority, if not all, of PinPics' stock of pins, so that's why they have some with those numbers. Pulse Gallery "took over" the PinPics Artland dealers (some agreed to stay on, some did not). At one point, there was a rumor that the prior owners of PinPics were partners with Pulse Gallery, but that died down after a year.
PinPics owned Pinopolis and tried to do this game with pins and then also went to try to do digital pins.
PinPics did games at their in-person trading events.
Pulse didn't start printing numbers on the back of their pins until 1-2 years ago.