Bellagio nixing the $25,000 chip after heist

https://www.lasvegassun.com/news/2010/dec/29/bellagio-nixing-25000-chip-after-heist/

Seems as if 1.2 million out of the $1.5 million stolen will be useless to the robber after April 22nd.   If he has a plan for those chips, he better move quick.

That robbery seems like it was a hoax!

Several 1dime chips were used to bet with that day and the next day at an MGM property....

I thought you could only use Bellagio chips at the Bellagio?  And same for the rest of the properties, even if they're all under one umbrella corporation.