Buy bricks at 35% off

#1

The notification of buying 1650 bricks with a 35% discount just leads to an error message?
A regular brick purchase only gives bonus bricks but no discount. With the cost of 4 bricks per chapter, the expense of reading a non-free novel is too high. When do the completed novels become free to read? I am currently reading ‘Transforming into Billionaire Heiresses’ and I am enjoying the story (even when not understanding some of the translation). At this price it is becoming too expensive.