Today a customer emailed me about a problem, and I was able to guide them to a solution. This factory plant is 20 minutes away. Under other circumstances I may offered to pay them a visit, which I would charge for. I have two questions about business and moral:
- We have no support agreement, and it's not a regular customer. Can or should I charge for supporting by e-mail?
- It took me 15..20 minutes to find the right documentation and to answer some emails. I had a pretty good idea about the solution. Should I intentionally keep it to myself, so I would "have to" visit and charge for both travel and work?