I do graphic design and basic websites for clients who do not require a fully custom website.
I once had a client who would periodically send me photos to edit. They were mostly fashion photos and she just needed me to remove background for her. They were pretty simple and I would charge her a couple of bucks per photo since each photo took me less than 10 minutes.
Things started going south when after a few weeks - her deadlines started getting tighter and tighter, from a couple of days to a 24 hours turnaround. To be fair we had a standing contract about this particular job and she was always very prompt with payment so I thought I’ll do my part when it was really urgent and politely decline/outsource it when it was too much.
After a couple weeks, she stopped contacting me so I thought she didn’t need my service anymore.
One day I received this email from her
Client: Sorry I haven’t contacted you for a while. My previous business didn’t work out but now I have a new idea. I need a new website by next week. I can pay you $50.
Needless to say, I never bothered replying to that email.