Dono is streamer slang for a donation, and short alert sounds built around money became a running joke on live streams and in edited clips. This version spread as a reusable meme sound rather than a full song, shared between creators who needed a quick cue for tipping, spending or pay-to-win moments. Its length makes it long enough to register as an event but short enough to re-use mid-stream. It remains popular because the meaning is clear even without context: someone has just paid, and everyone in chat knows it.