Smart contracts on Ethereum are fully self contained and any information or access to off-chain data is restricted. Tellor solves this problem by creating a system where parties can request the value of an off-chain data point (e.g. ETH/USD) and miners compete to add this value to an on-chain data bank, accessible by all Ethereum smart contracts. Inputs to a data series are secured by a network of staked miners. The main Tellor smart contract creates a time series of each requested data series and aims to become the standard source of high value data for decentralized applications. This oracle, “Tellor”, utilizes similar incentive mechanisms to other cryptocurrency systems through the issuance of Tellor’s token, Tributes, that are used to request a particular data series from miners.
Binance Coin is the cryptocurrency of the Binance platform. It is a trading platform exclusively for cryptocurrencies. The name 'Binance' is a combination of binary and finance. Thus, the startup name shows that only cryptocurrencies can be traded against each other. It is not possible to trade crypto currencies against Fiat. The platform achieved an enormous success within a very short time and is focused on worldwide market with Malta headquarters. The cryptocurrency currently has a daily trading volume of 1.5 billion - 2 billion US dollars and is still increasing. In total, there will only be 200 million BNBs. Binance uses the ERC20 token standard from Ethereum and has distributed it as follow: 50% sold on ICO, 40% to the team and 10% to Angel investors. The coin can be used to pay fees on Binance. These include trading fees, transaction fees, listing fees and others. Binance gives you a huge discount when fees are paid in BNB. The schedule of BNB fees discount is as follow: In the first year, 50% discount on all fees, second year 25% discount, third year 12.5% discount, fourth year 6.75 % discount, and from the fifth year onwards there is no discount. This structure is used to incentivize users to buy BNB and do trades within Binance. Binance announced in a buyback plan that it would buy back up to 100 million BNB in Q1 2018. The coins are then burned. This means that they are devaluated to increase the value of the remaining coins. This benefits investors. In the future, the cryptocurrency will remain an asset on the trading platform and will be used as gas. Other tokens that are issued by exchanges include Bibox Token, OKB, Huobi Token, and more.