General
Blue Unlock icon
If you possess a Blue Unlock icon, you gain 5 gold in the income phase for each draft marker you have in the 5-gold drafting row. I.e. Two draft markers would earn you 10 gold.
You do not need a Blue Unlock icon just to place your draft marker to draft cards from the 5-gold row. You would not gain income from them, however.
Many rule questions have already been answered on Boardgamegeek.
If your rule question remains unanswered by this FAQ and the rule threads on Boardgamegeek, please feel free to post your rule question on Boardgamegeek.