I'm familiar with the last two, but I'm struggling to identify the first one.The best "Space Rogues" setting I've seen is a toss up between the Early Codoverse (Falkonberg and other start of the Codo era novels), The Vorkosiverse, and Ringworld... Falconberg's about taming the frontier as much as the merc ops. The Vorkosiverse, well, Miles and Ivan are both intelligence operatives - in different modes - and the side stories involving Ellie Quinn are Ellie doing things on behalf of ImpSec when Miles can't. And Ringworld? It's a terra incognita exploratum.
CoDo Verse is indeed initiated with Falconberg's Legion... but it's the same setting as Niven/Pournelle use (at the other end of the timeline) with the Mote in God's Eye, and it's sequels.I'm familiar with the last two, but I'm struggling to identify the first one.
Do you mean "Falkenberg's Legion" by Jerry Pournelle? (It doesn't match either of your spellings but looks like it might fit.)
All of them with trade systems create a play-loop, albeit one that often is very mechanistic...Are there any space games other than Scum and Villainy that have some kind of adventure structure mechanics or gameplay loops? Stars Without Number says its a sandbox game, but is missing all the mechanics from OD&D that created unscripted adventures.
Okay, I never heard of any of these either.![]()

(Dungeons & Dragons)
Rulebook featuring "high magic" options, including a host of new spells.