If to integrate MOC oracles you use GitHub - money-on-chain/Proxy_Oracle: This is a proxy governed oracle or the method described in MoC - Oracles you can dismiss this announcement.
About a year ago we started the decentralization process of our oracles, we have gradually gone through all the stages. 
The process started with the deployment on mainnet​:partying_face:. Then we had a prudent time of testing and monitoring in which although the price was being published, it was not consumed by anyone. After that, we migrated the Money on Chain projects one by one and those started to consume the price of the decentralized oracles.
Now we are reaching the last stage of this process: the deactivation of the whitelisted oracle (Medianizer).
At the end of this week we will stop supporting the price of BTC/USD in our whitelisted oracle (Medianizer contract: 0x7B19bb8e6c5188eC483b784d6fB5d807a77b21bF).
If to integrate us you use GitHub - money-on-chain/Proxy_Oracle: This is a proxy governed oracle or the method described in MoC - Oracles you should not do anything and this change will be transparent. On the contrary, if you call the Medianizer contract directly, you must make a change in your contracts to use GitHub - money-on-chain/Proxy_Oracle: This is a proxy governed oracle
0xe2927A0620b82A66D67F678FC9b826B0E01B1bFD this has the same interface.
If you don’t perform this modification, your contracts will stop working.
If you have any questions, we remain at your disposal in our usual support channels.
Discord (Integrator Support channel): Money On Chain
Telegram ENG: Telegram: Contact @MoneyOnChainCommunity
Telegram SPA: Telegram: Contact @MoneyOnChainComunidadEsp