I see @TheVicious85 already pointed out some major hunt groups. Here’s a random quote grabbed from a hunt:
200 oort in 30 minutes is 9s per rough oortstone. Over the longer haul. it looks like @Hazel1558 averaged 12 seconds per stone across 180 minutes - but the hunt lead also isn’t always pulling the most oort.
If you fill up a small sovereign then as a group you’re doing 20x that; roughly. 20ss in 180 minutes or roughly 100 rough oort per minute. Again, as a group. 5760 per hour, or 250000 shards.
That’s enough oort shards to fuel a 1x2 portal for (roughly, heh) 28 years 
The SS of rough stones (single player, 3 hours) is more like a year and a half - 1.42 years worth of fuel for someone that just wants a 1x2 to a network hub - in 3 hours of running around smashing stuff with a group.
Fun with Calc TM
Hopefully that encourages some hunters!