How can I compare the true cost of spinning at 20 cents versus $2?

How to use this answer

This answer is based on the mathematical principle or published rule identified in the source below. If the question involves a live betting market, confirm its settlement definition before applying it to a specific bet.

Multiply average theoretical loss rate by total amount staked; a larger stake increases expected dollar loss even if the percentage is unchanged.

Return-to-player and volatility are statistical properties, not promises for an individual session. A streak or a near miss does not establish that a particular spin is more likely to pay.