It is common for registrars to offer large discounts on first registrations. But then the prices can go up (a lot) in the following years. The idea here would

It is common for registrars to offer large discounts on first registrations. But then the prices can go up (a lot) in the following years. The idea here would be to have a price that is fixed, i.e. it would not change depending on business or commercial decisions.