I don't have any method of paying online, well, there is, but it takes too much of effort doing the paperwork in bank that it's not even worth it. I don't live in first world country.
Install a LAMP/WAMP thing (+ python) and run NewsBlur locally. You could even make a local edition where people can pay you in person.
Nothing, but currently there's no way to try it before buying, which is a problem.