For every $100 dollars Brewly brings a vendor, we take $5. This fee is taken automatically. The site has its own self-hosted bitcoin payment processor. Please see our about, privacy policy, and FAQ page. There's a lot of easy to digest information there that I believe will answer the majority of your questions.
I tried to order last weekend but coinbase ended up being a cunt and held my transaction for 72 hours so I’m a little familiar with your website. There was a “Network fee” listed that came to $7.60 on a $380 order. That was a new layer.