Quoted from MrBally:
Video games still had hard meters like EM pins.
Keep in mind, too, that at least for WPC machines, the operator could manually install a hard meter -
For WPC/WPC-S, it was connecting it up to the knocker output. (Meaning, no knocker.)
For WPC-95, you had to either (1) Buy a coin-door interface board with a meter installed, or (2) find the model of coin meter and solder it in yourself.