It is a shame for Elementary OS Team, because this issue was many times discussed on GH issues / IRC about implementing just a "$0" button. As I remember in launchpad there is also a task or discussion about suggestion of the dialog which will remind about donation after certain time duration.
[1]: http://blog.elementary.io/post/110645528530/payments
[2]: https://github.com/elementary/website/pull/655
It is a shame for Elementary OS Team, because this issue was many times discussed on GH issues / IRC about implementing just a "$0" button. As I remember in launchpad there is also a task or discussion about suggestion of the dialog which will remind about donation after certain time duration.
Edit:
Found https://blueprints.launchpad.net/elementaryos/+spec/donation...