That was the number from the age check in my slime sim, the one the ad settings read

Birth year was a scroll list. The top of the list was the most recent years

92.5% of people tapped somewhere near the top and kept going, so almost everyone got filed as a kid and the ads paid kid rates

Switched it to a box where you type the year. Over 13 went to 60%

Nobody got older, they just had to type four digits

I make a slime idle game and the worst-balanced thing in it was a dropdown

Slime sim on Play: https://play.google.com/store/apps/details?id=com.dumbgamelab.slimesimulator&referrer=utm_source%3Dlemmy-ml-incrementalgames%26utm_medium%3Dsocial%26utm_campaign%3Dlemmy-ml-incrementalgames_organic