From other posts I found to be true:
Not a normal sweetener. Brings richness and moistness-a bit of sweetness like the burnt caramel.
EM: Tiny Bit (A fraction of 1% in your mix) - Gives a "body" to the vapor and may slightly reduce sharp notes.
A Bit (Close to 1% +/- in your mix) - As above but will take the edge off sharp notes and may very slightly sweeten.
A Bunch (1%-5% of mix) - As above plus sweeten. I rarely exceed 2%.
A Load (10%+ of your total mix) - Cotton Candy flavor. I would not try this.
Note: Circus Cotton Candy tastes is not EM and tries to mimic real cotton candy.
Almost any sweet flavor can be used as sweetener. Some folks like to use Marshmallow under 2% to sweeten. Sucralose (Most Common) – Better liquid Stevia in my opinion.
Is it okay to use it as a sweeteners
Sure.