Keltham's thoughts show sincerity (of course, he's a cleric of Abadar negotiating a trade deal with somebody who hasn't visibly betrayed him yet) and some not especially Golarion-comprehensible thoughts about logarithmic utility functions if you're spending money on yourself and what that says about fair division for really large amounts of wealth. Abrogail does know what a logarithm is, but the connection in Keltham's thoughts is not clear.
"If you were willing to take some of your share of the gains in a public investment fund that stayed in Cheliax, it would potentially simplify some political problems for us." And also probably be the sort of thing that's much easier to contractually yoink, if Keltham tries to leave.
Abrogail does have some thoughts about how Keltham's gains, if he tries to leave, could be made payable him "in the standard backing of value for Chelish currency", the trouble is, that gets caught by that incredibly audacious clause he innocently dared to offer Lrilatha about terms not expected to have unexpected unpleasant consequences. If Keltham's departure leaves behind most of his gains in the form of a Cheliax-only investment fund, if they can get away with including that clear and understood term, it might save Cheliax quite a lot of loss.