Its irellevant what we think should happen, 5% every 2k ingots spent or 10k, doesnt matter.
We all assumed seeing the payouts after 3 days the current rate of coupons being given out was suddenly changed and noone knew. tons of people are spinning because they think "wow if its 25k now 5% is huge" not realizing that you wont win it. since yesterday you would win 5% at least once if your spent 2k.
Obviously 5% now is like BOOOOOM but..this would be like last weeks wheel giving hokage 3rd, 80frags. then all of a sudden ..nope! 1 frag. Obviously we knew that it was 1frag though so thus we didn't care.