See I was similar but the big difference back then was a random little 99c app on iOS would make you several thousand dollars a month, so the $100/year fee was nothing for a long time. It was only after around 2012 that things changed.

On Google Play I never, ever had any app be anything close to as successful as on iOS. I think I probably made less than 1/100th the amount I did on iOS back in the day.