Why would people have a reason to be pissed if they're earning less koins per post? The current ones shouldn't be touched.
The easiest way would be to remove the $1 rule, lower the payouts, raise costs in the shop (suggested this a long time go, not sure why it never happened), and add options to the shop. For example: upgrades should be at least 1.3x higher than purchasing with cash, username/user titles should be raised to at least 3,000, and maybe an arcade/betting area to blow your koins in when you have nothing better to do.