If a court makes a ruling based on a principle established in a previous ruling from another court, it is an example of

stare decisis

Explanation:

In law, stare decisis can be described as a situation in which historical cases are used for forming a rule when a similar case is seen. In this type of system, rules are formed in consideration of the previous rules which were acknowledged for a similar case. Stare decisis simply means to stand by what is already decided. The principle of stare decisis is the core of U.S common law. All court relies on U.S supreme court precedents.

in this scenario it would be the consumer demand as most influential in making the decision. the band members need to figure out where and from whom they will make the most money, in other words who out of the two consumer groups - football fans or car drivers - will spend their money, who is more likely to contribute to their cause and buy what they are offering.

the technology changed agriculture in an impacting manner since many people left the field work by a cellular or other technological appliances