Making Android apps was my introduction to publishing software. I remember in ~2011-2012 you could upload an APK and it would be published immediately and the Android Market had a "New" page which was just a chronological feed of recently published or updated apps. Just uploading your app update was an easy way to get ~500 free downloads which I found very exciting.

At the time I couldn't imagine paying $99 for an Apple Developer account and waiting a week to publish my app...