What kind of economy could exist in Sysop Space?
Nobody can say without knowing first whether a Sysop would be in the business of granting general wishes. If a Sysop provides protection, but offers no other services, then a full-fledged economic system could exist not entirely unlike that experienced today, only more efficient (a Sysop could protect participants from fraud). If a Sysop grants general wishes, then a smaller scale economy might still exist, wherein services are traded that the Sysop could not provide, such as those requiring the voluntary infringement of freedoms or the most subtle sentient touch. After all, even in a simulated environment, you could not create another self-aware entity without complying to reproduction regulations and without this new sentient being entitled to the same protections as yourself. Your allocated resources might be the ultimate medium of exchange in such an economy, but barter might work just as well.