While I am on board with the concept of leaving no man behind, wasting a recently earned crown for little more than a little extra standing isn't something I like to do either. Perhaps if the rescued Solaris gave something on top of the standing, I would be more inclined to help them out.
Perhaps something like this:
Granum Crown: 300 standing, low tier resources [Tepa Nodule, Phasmin, Scrap], and a chance at a Vega Toroid
Exemplar Granum Crown: 600 standing, medium tier resources [Lathe Coagulant, Amarast, Medical Debt-Bonds] , and a chance at a Calda Toroid
Zenith Granum Crown: 900 standing, rare tier resources [Zodian, Atmos Systems, Ecosynth Analyzer], and a chance at a Sola Toroid