Could we raise the price to 5 dec instead? A 10x increase seems a bit extreme to me. People trying to sell reward cards already have thin profits(or in many cases a loss) after paying to unlock them. 5 dec should be enough to reduce the spam, and if I am wrong we could always raise the price at a later date. There is a reason the federal reserve will raise or lower interest rates in small increments. Economies need time to adjust and don't adapt well to drastic changes.