Crazy_DarkSide_Cat
Giving eternal/super long life to voldemort and his supporters just for some intel seems pretty stupid. Not to mention financial power it can give him.
Voldemort is already immortal and has an entire country working for him, the stone doesn't actually help him that much. Additionally the stone might not be able to make more than very few people "immortal" and considering wizards can get up to 300 years old, this doesn't matter in the short run. The gold is more of a problem but without the intel there might not be any chance anyway.