I ended up being the sole developer for a system that managed vehicle trackers installed in fleet vehicles.
A few months after I took over they picked up a new client that was a finance company for people with bad credit ratings who wanted to purchase vehicles at exhorbitant interest rates. The trackers allowed them to remotely disable vehicles if the finance payments weren't met.
After a while they became the systems's largest customer and finally the only customer. They then asked for some changes so that all their vehicles would be remotely disabled at the start of each month and would be re-enabled when that month's payment was received.
Fortunately, they then purchased the system outright from its current owners and that allowed us to stop developing for them.
A few months after I took over they picked up a new client that was a finance company for people with bad credit ratings who wanted to purchase vehicles at exhorbitant interest rates. The trackers allowed them to remotely disable vehicles if the finance payments weren't met.
After a while they became the systems's largest customer and finally the only customer. They then asked for some changes so that all their vehicles would be remotely disabled at the start of each month and would be re-enabled when that month's payment was received.
Fortunately, they then purchased the system outright from its current owners and that allowed us to stop developing for them.