I think another reason why Maytag avoided charging things just for the sake of doing so is it made for parts that could be interchangeable. If you look at the Maytag HOH’s produced from 1966 to 1975, was easy to interchange timers and other parts. For example, if someone in 1966 bought a Maytag DE306, 10 years later the timer gave up the ghost, could easily installed a 407 timer if that’s all the tech had on hand at the time. Washers were similar as well, timers were interchangeable.
If it was any other dryer from that era, good luck trying to install a different timer since other models in other companies lineup’s were built around that particular price point, timers were only specific to that particular model.
Whirlpool on the other hand couldn’t keep a model around from one year, makes finding replacement parts impossible, I know, it’s been absolute hell trying to find a replacement timer for my Whirlpool. Even the appliance junkyard in Arizona doesn’t have it, even after looking for one high and low. A Maytag on the other hand, you can just install one from a model below and it will work.