From what I think is that since the zones got updated almost no one went to cap them. One of the reasons why for this is because it doesn’t give enough money anymore to compensate for gear sets. Another reason for this is that you have to be in the zone to get the money, I understand why this...
sorry to tell you, but no one will pay 500k for spike strips, which first you need a skill for and second they are very easy to get
The max someone will pay you is some Coffee(costs more than those spike strips)