[danillonunes]

> Also curious how variable transaction costs are taken care of?!

The article says users will need an account with Uzzo or Criptohub, Cielo’s network partners.

So I guess they aren’t doing a actual bitcoin transaction for each payment. You have to send your bitcoins to your exchange account first and then it controls your balance internally without having to interact with the public blockchain. You, the payer (Criptohub account owner), probably pay for the fees when you transfer your bitcoins to your exchange account.