identifying at the rewards server the rewards qualified user, wherein identifying the rewards qualified user causes authorizing debit of the account of the rewards qualified user at the rewards server for play of a system game and initiation of system game play, upon successful qualification for a rewards mode involving {TAIL ~ at least another} of {HEAD ~ the plurality} of gaming machines 
identifying at the rewards server the rewards qualified user , wherein identifying the rewards qualified user causes authorizing debit of the account of the rewards qualified user at the rewards server for play of a system game and initiation of system game play , upon successful qualification for a rewards mode involving { TAIL ~ at least another } of { HEAD ~ the plurality } of gaming machines
OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH TAIL TAIL TAIL TAIL TAIL TAIL TAIL OTH HEAD HEAD HEAD HEAD HEAD HEAD OTH OTH OTH