During the "No Good Deed" quest Jar'Jo-Zhid told me that he will make sure that I will be rewarded for not blowing his cover:

When asked about the transaction record, Jar'Jo-Zhid, realizing I was a member of House Hlaalu, asked me not to tell Davor he was a spy in disguise. He will ensure I am rewarded if I do this.

But nothing happened since when.