Unfortunately, while technically innovative, UbiTok.io’s totally decentralized exchange technology has not proven commercially successful.
In particular, paying Ethereum gas costs for each order placed or cancelled was unattractive to market makers - and without market makers, it’s hard to attract casual users.
Regrettably, the UbiTok.io exchange was permanently shutdown in July 2018.
(Being unstoppable, the exchange smart contracts will continue to function as long as the Ethereum network is willing to execute them - but it’s hard to interact with them without the UI ...)
Thank you to all our users and token creators for your support.