Board Thread:Questions and Answers/@comment-7383378-20130328132148/@comment-6363275-20130328150349

Assume that just means players who do not spend any real cash on the game, ie buying gold for additional items or summons.

"cash players" are those willing to spend real money on summons or items to gain the advantage. And it is a definite advantage for them as they have the best of the 5 star deamons.