Oh okay, per tier... I didn't pay attention to that because I am not buying anything. Yep, they have done that in the past, worsen the low tier ones so that players feel the need to buy the higher ones for the same results as before.
Not surprise there. They also took out double fragments events because they lose money from that, and put the Celestial Potion from 70$ to 100$ because many people were buying it. Lilith's logic is always up the prices when it is being bought in masses, instead of keeping them or lowering them to be bought even more.