How do shops work in those jurisdictions? Don't they usually rely on an ‘offer’ that is semi-implicitly accepted by a client? And which is afaik a form of contr

How do shops work in those jurisdictions? Don't they usually rely on an ‘offer’ that is semi-implicitly accepted by a client? And which is afaik a form of contract? I thought that this is the mechanism that licenses use. This seems to be the thing in English: https://en.wikipedia.org/wiki/Offer_and_acceptance https://en.wikipedia.org/wiki/Offer_and_acceptance