[playersare]

strategically speaking, it would be virtually impossible for all 8 players to call all they way down to 7th street with playable hands, no more likely than 10 players at the river in texas hold em. though I haven't played a TON of stud online, I'd say the chances of cards running out in a single hand is probably even rarer than a royal flush, and would involve numerous if not all players to be drawing completely illogically to do so.

that being said, the last remaining card(s) shared by all players I believe is the correct rule should it actually happen.