You may be right about reddit. The only decent source I can find is https://civicscience.com/nearly-4-in-10-americans-under-35-say-theyre-reddit-users/ https://

You may be right about reddit. The only decent source I can find is https://civicscience.com/nearly-4-in-10-americans-under-35-say-theyre-reddit-users/ https://civicscience.com/nearly-4-in-10-americans-under-35-s... , but it agrees with your estimate.