Bitfinex does not offer Tether.  However, Tether and Bitfinex are owned by the same parent company.  It's all moot, because Tether is effectively disconnected from the banking system until further notice.  My hunch is the banks realized that Tether was basically running as an unregulated bank, like Liberty Reserve 2.0. Guilt by association, so the banks disconnect from Bfx as well (that part is speculation).  The only way to get funds off Bitfinex is to buy BTC with fiat, which is why the price is so high.  Similar situation with Polo since Tether is fucked right now.  Interesting note, the legal statement at tether.to makes it very clear that Tether is under no obligation to convert tokens to USD.  Bitfinex has been leading this rally for quite some time, so what happens now?