In the latest Faction Journal Cards of the Exchange, it says:
INVESTOR (2+ goals): Once per game session, you may purchase an item found on one of your Chronicle sheets at a 5% discount (maximum 15% discount). When you attempt a Day Job check, you may record the gp earned in an investment box (to the left) rather than receive the gold. You can line through all investment boxes to immediately receive gp equal to twice the sum recorded in the boxes.
Does that mean I can only double my dayjob incomes once, or every five adventures I can clear these boxes all and rewrite for the next five adventures?