I think the Free Software definition requires that the user have the freedom to use the software for any purpose, including commercial. I am not a lawyer, but I have understood this to imply that restricting commercial use would make the license a non-Free one.

On Sun, Dec 25, 2022 at 11:31 PM rabbit <rabbit@callistohouse.org> wrote:
I am unfamiliar with FOSS licensing. Does anyone know about an open source license that allows free use for free software, but requires payment if its uses are for commercial software?

โ€ขโ€ขโ€ข
๐™„๐™› ๐™ฎ๐™ค๐™ช ๐™–๐™ง๐™š ๐™™๐™ง๐™ž๐™ซ๐™ž๐™ฃ๐™œ ๐™– ๐™‹๐™ค๐™ง๐™จ๐™˜๐™๐™š, ๐™ฉ๐™๐™–๐™ฃ๐™  ๐™ฎ๐™ค๐™ช ๐™›๐™ค๐™งย 
๐™ข๐™ค๐™ซ๐™ž๐™ฃ๐™œ ๐™ค๐™ซ๐™š๐™ง, ๐™จ๐™ค ๐™ฉ๐™๐™–๐™ฉ ๐™„ ๐™˜๐™ค๐™ช๐™ก๐™™ ๐™จ๐™–๐™›๐™š๐™ก๐™ฎ ๐™ฅ๐™–๐™จ๐™จ!ย 
Arrivederci, rabbit โ€ข D๐™–๐™ฉ๐™จ๐™ช๐™ฃย ๐Ÿฎ๐Ÿฐ๐Ÿฌ๐™• โ€ขย ๐Ÿฐ