As far as I understand the reward decreases with increasing difficulty and increases with increasing N.
Does anybody have an idea when the N increases?
Yes, I have ...
May 14, N=64, 8Kb May 17, N=128, 16Kb May 20, N=256, 32Kb May 29, N=512, 64Kb
etc ...
+ from first post
Note: Incrementing N will lead to immediate hashing speed decrease. Difficulty will reflect these speed changes (i.e. difficulty will decrease after N++) with lags. As soon as block reward depends on difficulty the reward will increase also and more miners will be motivated to join after N++. It's not easy to predict now but we can be sure that some waves will happen on each N++ event.