Several companies offer discounts to members of forestry associations on presentation of a membership card. Now one more company has been added to the list – Skógræktin Ölur in Sólheimar – which offers a 15% discount (not valid with other offers).
Information on which companies offer discounts (and how much) can be found here: https://www.skog.is/skraning-i-felog/. You can also sign up to join a forestry association there.