Patty and Selma have a gag that breaks the fourth wall when they say they can't have a cigarette since they went to Disney. Disney recently purchased 21st Century Fox, the previous owners of the Simpsons franchise.
At the end of the video presentation shared by Professor Frink, there was a "board" which on the last line stated "Also, we know who Satoshi is, but we're not telling". Satoshi, or Satoshi Nakamoto, is an unknown person or group of people who have used this persona to establish and promote Bitcoin (founded in 2008), on which Frinkcoin is a thinly-veiled allusion of.
Professor Frink sang a variation of "Putting on the Ritz" by Irving Berlin called "Hangin' with the Frink".
The renminbi is the official currency of the People's Republic of China.
"Thanks for the currency" is a variation of the song "Thanks for the Memories " composed by Ralph Rainger with lyrics by Leo Robin.