Supply : 9999999
Looks like Rising Star is similar to Splinterlands, just with much bigger card supply. This is why the prices are affordable. Because of the huge supply, not because of the low number of players. Some of the cards in Splinterlands have a supply of less than 1000 cards. If those cards would have a supply of 9999999, no one would sell them for thousands of dollars, but only for a few cents.