It's basically because the manufacturer did not design the batteries for vaping and therefor don't want to be held liable should something go wrong. These 18650s are actually designed to go in sealed battery packs, we just found a better use for them ;)
You can always trust Mooch's...
Item for Sale : Dvarw FL DL (SXK Clone), includes additional airflow inserts
Selling Price : Sold
Condition : 9/10
Age of the item : 2 Weeks
Clone or Authentic : Clone
Location of item : Sandton
Delivery/Collection : Either, delivery cost on buyer
Reason for sale: New gear
Add a picture here ...
Item wanted: Geekvape Aegis Max (Mod only) in Black
Price Preference: We can discuss
Condition: Good
Age of the item: N/A
Location of item: Sandton preferred but I can arrange a courier
Delivery/Collection: Either
Reason: Want one
Picture here (if it helps describe what you looking for) :
These things happen, don't beat yourself up about it. I can honestly say that I would not have the courage to manage a group buy of this scale. You've done very well.