The 2 Maytag HOH’s and early 60’s Whirlpool dryer I have didn’t have a single cent in them. The one piece drum of some models doesn’t allow them to eat change very easily, if at all.
You’ll known when a Maytag HOH (at least the electric versions) since it’ll pop the breaker when coins and metal objects fall onto the heating element. People were probably were mindful when that happened, or knew of people who had that happen before.