I've skimmed the paper and read the summary publicity, and I don't really get how this could be construed as a general intelligence. At best, I think they may've encoded a simple objective definition of a convergent AI drive like 'keep your options open and acquire any kind of influence' but nothing in it seems to map onto utility functions or anything like that.
The idea is that entropy can be treated as utility.
Thus entropy maximisation. Modern formulizations are largely based on ideas discovered by E. T. Jaynes.
Here is Roderick Dewar explaining the link.
If it's worth saying, but not worth its own post (even in Discussion), then it goes here.