Historical russian currency of a very small denomination is called

Ruble or rouble

Explanation:

The Ruble or rouble was used as a silver coin in the 1700s that is during the time of the Great Peter I before it was replaced from silver coin to a gold coin in the year 1897 by Soviet Union and Belarus.

Because of inflation the Ruble or rouble value later reduced in the year 1917 (that is during the time of of Russian Revolution) and this led to the formation of another unit of money as standard which is known as the chervonets.

Later, in the year 1947 the Ruble or rouble is then adopted again.

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.