Sell Comision in pro club

Hi, i dont understand how the commision of the PRO CLUB subcription works

Enhance your earnings, sell more and become a professional! Join the Pro Club to get 6% commission on the sale of any items on Gameflip. Includes VIP seller support.

i get 6 percent of commision ? or dicount me 6 percent of the sales?
i am the gamer club now and i have 0% commision for sale.

Can anyone explain me this.
Thanks

Commission and fee are what Gameflip takes from your sell price. Suppose you sell a gift card code for $100, there’s a 8% commission and 2% digital fee so you get $90 total (100 - 100*(0.08+0.02)).

All subscriptions have a 0% digital fee. Gamer Club subscription has 0% commission but you can sell up to $50 worth of items. Pro Club has a 6% commission but you can sell up to $500 worth of items.

https://gameflip.zendesk.com/hc/en-us/sections/115000044274