How BIG clients destroy your motivation when they leave? Share your stories.

My quick story:

A few months ago I launched a small SaaS which delivers Opensea.io likes and views using a bot system I've made. At first, I was expecting to get a few orders requiring to deliver 10-100 likes/views and grow from there.

After a week of launching exactly the same happened - the first 10 likes order. After a few more days another two small orders, resulted in a huge motivation to move this project forward.

What happened next was quite unexpected. The client contacted and asked if I'm able to deliver 150k likes per week at a price of $0.05 per like. I was shocked because it's $7000+ per week. Immediately turned 40 server instances on and started working with that guy ASAP which generated me $20k of profits in a few weeks.

It lasted for about 3-4 weeks and then the client suddenly said "sorry, I can't work with you anymore because the methods I've been using stopped working for me. Goodbye.", so I went from $7000+ / week to $10 / week instantly and that completely killed my motivation to move this project forward.

Do you have similar stories to share? It would be very interesting to read!

BTW I have a few copies of bot code to sell, if anyone is interested please let me know.