That's pretty awful from the user point of view though. It's bad enough to have to pay - much worse to pay a randomly fluctuating amount and feel like you need

That's pretty awful from the user point of view though. It's bad enough to have to pay - much worse to pay a randomly fluctuating amount and feel like you need to count your pennies every time you add a feed to your reader. Definitely would not advise this model for a feed reader.