Earlier quoted context omitted.
This is not a donate button. Donate buttons are complicated and require you to make all those decisions. With Flattr you have to decide once how much you would like to give per month and that’s that. One decisions and you can click away. It’s hassle free. I don’t think we know why people don’t like donate buttons and your hypothesis (“People don't like paying for stuff they can have for free.”) might be wrong. Maybe…
I agree. Existing donate buttons are cumbersome and discourage the shift in perception that's needed. I think Flattr's on the right track but the subscription model at its base is still overly cumbersome and inflexible. They've indicated they have more flexible and radical models in mind. Hope they pursue them.
The simplicity is the entire point. "More flexible" == more complicated, and then I won't want to use it anymore.