They also let her into the country without a visa.
She was attempting to do DOJ a favor, along with her client, because the meeting with the Trumps, even without anything further, alone would justify a FISA warrant. That was at least part of the payoff and why her client gets a sweet deal.
No, she was given a special circumstance waiver from October 2015 through January 2016 to represent her client. Why and how she was here in June is unknown. She may not have left, after her request for an extension was denied. As for the deal, see 22.