The basic way it works.  The coin generates a random number 1-1024.

It bases the reward amount on the value generated. Only 1 number out of 1-1024 creates the SuperBonus Block.  Other numbers signify the 27K bonus, etc.

So, while on average it should be 1 out of every 1024 yields a SuperBonus block.  It's also possible for 2 to hit in a row if they both randomly hit or none to hit for 3000 blocks if it's an unlucky cycle.

That's the fun part of the coin.  Could get a long unlucky cycle or hit 2 in 20 blocks as happened 1 time already.