well that didn't last long, but the source code license was pretty bad, so this is not unexpected. https://arstechnica.com/gadgets/2024/10/winamp-really-whips-open-source-coders-into-frenzy-with-its-source-release/
Winamp deletes entire GitHub source code repo after a rocky few weeks

Winamp released its source code with a license that drew a lot of attention. That’s when other apps’ code was found inside.

Ars Technica
@djlink I saw some posts about people or bots were opening issues in their repo, but I did not understand the reason, that's just a code of nostalgia who uses winamp now 🤓
@thejvmbender the problem was the license they made for the source code
@djlink @thejvmbender yeah, a sad story! Hope they will get back with MIT license for Winamp.