This was my least favorite of the Silverberg stories that have appeared here.
For starters this one (like Now+n,Now-n) were based on the sole motivation of "my future happiness depends on my ability to cheat the stock market and become filthy rich", which didn't make me want to root for the guy. But in that other story, the idea was one I'd never heard of before so it got bonus points for that. This idea I'd seen on Early Edition more than a decade ago. I realize that the story was written long before (and was quite possibly the inspiration for Early Edition) but that's still the order that I viewed them in. Also, in Early Edition, the protagonist went out of his way NOT to use the paper for his own monetary gain through gambling and stocks, so I had to give him kudos for his sense of ethics unlike these folks.
It got rather more interesting once it became clear that the people's numbers never matched up with each other in the first place, but the idea was "entropic creep" was inserted into the story rather randomly, probably simply to foreshadow the ending. It sounded completely out of character for this random suburban guy, and sounded like he just had a vague recollection from high school science classes of the concept of entropy, which isn't really that applicable here. And then he turned out to be right.
And the gray formless ending, bleh. It struck me as just a slight variation on a "waking up" beginning or "white room" beginning where the character's state matches the writer's mental state as they're trying to form the story ahead of them. So it's like he didn't know how to finish it, and so he didn't.