It may be illegal in many jurisdictions (not sure since nobody's playing for legal tender). But regardless of legality, is it moral or ethical? If all players

It may be illegal in many jurisdictions (not sure since nobody's playing for legal tender). But regardless of legality, is it moral or ethical? If all players know that the schmucks at the bottom of the pyramid lose their money to enrich those at the top, is that OK? Or is there something fundamentally wrong about a 'business' that produces no new value and systematically transfers and concentrates existing value from the bottom to the top?