At the time of signing the MonolithosDAO protocol, a total of 1 million MDTs existed. To find out how many MDTs currently exist, check out the MDT Token Contract on Etherscan
https://etherscan.io/token/0x4Dfd148B532e934a2a26eA65689cf6268753e130
Who is the oracle?
We use MakerDAO oracles. The modules Feed and Relayer. The Feed asks for the price and the Relayer delivers this price to the contract.
Feed takes the median from prices from different sources (direct ETH/RUB pair or calculate the price of ETH/USD median (USD/RUB).
Sources for ETH/RUB: binance; cryptocompare; exmo
Sources for ETH / USD: bitstamp; coinbase; gemini
Sources for USD/RUB: exchangeratesapi; cbr; ratesapi