The main issue with this type of payment model isn't the money; it's the mechanics of it.
If something behind the scenes automatically took my $0.50, kept track of the fact that I was entitled to read it on any device and browser I might use anytime in the future, and didn't bug me about it ever again, then it might be workable. I don't have a problem paying a few cents for an article. I have a problem manually entering into the transaction to pay a few cents every time I want to read an article throughout the day.
If something behind the scenes automatically took my $0.50, kept track of the fact that I was entitled to read it on any device and browser I might use anytime in the future, and didn't bug me about it ever again, then it might be workable. I don't have a problem paying a few cents for an article. I have a problem manually entering into the transaction to pay a few cents every time I want to read an article throughout the day.