I do not really understand the idea of the project, in pizzeriai it will be necessary to purchase POS terminals with the software of this project?
Did you read carefully about their first post or whitepaper? You can understand that, this project is for retailer and buyer can make deal more easier via their application. They have 3 production for serving this idea : EterPos - look like payment gate, EterWallet - wallet, of course, EterPay - look like EterBank Shares.