Victor was a billionaire with access to drugs and treatments to prolong his life. Dude was 200 when he died.
With that in mind, most of Victor's kids probably didn't have access to that kind of money. Meaning that quite a few of them are dead.
And the ones who aren't are probably quite a bit older than Shade and probably don't want to go into the Planet Rush, chasing after the fortune of a man who abandoned them.
Going by Shade, they might not even know who their dad (or mom; Vic was addicted to mods, after all) is.