Snowfall
A macOS app that makes it snow on your Mac, with snow that piles up on windows, desktop icons and the Dock, icicles that form and a snowman that appears and melts.
Problem it solves. Provides a purely decorative/novelty visual enhancement to macOS for users who want a festive or delightful desktop effect.
Who pays. Mac users who enjoy decorative/novelty desktop customizations or small gift purchases
Market. desktop customization / consumer mac apps
How it makes money. $2.99 one-time purchase via Paddle (no subscription, no account)
The post describes a launched, purchasable mac app with a real URL and payment setup (Paddle); multiple commenters report trying and liking it, and one said they purchased it, supporting authenticity.
“You pasted the icicles and snowman paragraph twice, word for word. Nice snow though.” ▲ 1
“Small thing, but the body and the screenshot don't agree: you say a nudge forms icicles under the window, while the image says moving a window makes its icicles snap off.” ▲ 1