As XBTS DEX is a BitShares platform, it is obvious that they have the same registration process and the same account models. XBTS built using the latest in industry research, BitShares 2.0 offers a stack of financial services including exchange and banking on a blockchain.
XBTS has several different kinds of accounts: Basic Account, Annual Member, and Lifetime Member. Basic Accounts are Free, but do not qualify for the referral program, not any cash back on transaction fees. More information https://ex.xbts.io/#/explorer/fees
SmartCoins provide the freedom of cryptocurrency with the stability of the dollar.
A SmartCoin is a cryptocurrency whose value is pegged to that of another asset, such as the US Dollar or gold. SmartCoins always have 100% or more of their value backed by the BitShares core currency, BTS, to which they can be converted at any time at an exchange rate set by a trustworthy price feed. In all but the most extreme market conditions, SmartCoins are guaranteed to be worth at least their face value (and perhaps more, in some circumstances). Like any other cryptocurrency, SmartCoins are fungible, divisible, and free from any restrictions.