conditional

  1. As long as you increase your order, we can give you a greater discount.
  2. Unless you increase your order, we won’t be able to give you a bigger discount.
  3. Provided you increase your order, we can give you a bigger discount.
    Are these sentences conditional?
    Which type does each one belong?
    Thanks.

Are these sentences conditional?
While the first may be called ‘situational’ the others can be conditional though the general meaning is more or less the same. However, I would recast 1. as:
We can’t allow a higher discount as long as you do not increase your demand.
OR
The higher you demand, the more we discount.
The higher your demand, the more our discount.

I don’t think (1) requires a recast. The original is more natural.