This test is more for to be comfortable with tech. However, you do have to pay a fee but in testETH of course.
I started to withdraw my testSTORJ tokens. The normal fee is 0.495 testSTORJ ~$0.17, processing time: 50 minutes
The Fast withdraw Fee 4.79 testSTORJ ~$1.61, processing time: 20 seconds
I selected a Normal.
I also can select other tokens to pay a fee.
WOW. It’s processed almost instantly
Ah, no 
It is submitted instantly, but still processing
https://rinkeby.zkscan.io/explorer/transactions/sync-tx:14572db594257cdd654a354582c66493c59673b3ed1c0bf5e624efd503d877b2
Edit2:
And finally it’s confirmed
Gas used: 63,867 but I didn’t pay it. It seem was taken from the fee in tokens. Very interesting.