When would Bing Ad charge my Paypal?

imonboss said:

Is there any threshold to be met before bing ad charge my paypal?

I already have a $100 coupon redeemed, my account type is prepay and ad is already running and receiving impression and clicks!
Any Bing ad expert can give me this piece of information?

http://prntscr.com/nu3vtt
https://prnt.sc/nu3wr2

Edit: It's a brand new account.

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