Some Backstory:I have been doing business with this client for over a year now. I built a tool that converts one file to another and saves them around 6 hours of manual work per month. There is still some manual processing going on and thus sometimes it doesn't work – inconveniently most often on production night… I helped them. And then I asked for compensation afterwards as my help was necessary due to a screw up on their part.My mail before this interaction was basically “pay me what you want, but if you don't – you might end up with no more support”.Enjoy 😉