Hosts, settle down before bugging out!!
I have finished all of my global event challenges and I am on call to help others while collecting stars to buy named caches. After we have completed our objectives, I open a named cache and share the item if I don't need it ( as long as I have enough stars to buy one; if not, I open a Field Proficiency cache and share the items). You will miss it if you leave immediately after completing the objective. Cool your jets a bit and you might get something nice. I make a note of the host's name and I will be near you when I share an item as long as you don't skedaddle immediately.
Also, thank you for putting out the call for help. I really like the feeling of helping people out!!