> I would feel bad sending back an answer that it's not my bug, and then saying they owe me a few hundred dollars. Why? If I take my laptop into the shop, and

> I would feel bad sending back an answer that it's not my bug, and then saying they owe me a few hundred dollars. Why? If I take my laptop into the shop, and after 2 hours of work they determine it's because I spilled coffee into the USB ports, don't you think they're going to charge me for the evaluation, let alone the repair? There are types of business that can offer free support, even of problems not related to their product. A 1-person freelancer is not that type of business. There's lots of great suggestions in this thread for getting your time paid for. These have the dual advantages of earning you more money, and ensuring you get better, more savvy customers. This is because the ones who understand the value of support and care about long-term success instead of penny-pinching will self-select themselves as part of your contract negotiation process.