There are r3 alpha builds for PPC and x64 from rebolsource.net but they're from 2013. There are sometimes daily builds of renc which are uploaded to S3 including x64 OSX from Travis-ci.
Low number of users doesn't mean dead. A Rebol 3 version now compiles to wasm. You can check the interpreter running in a browser at hostilefork.com/media/shared/replpad-js/
You've probably forgotten but at one stage the red.r script was ported to ren-c.
There are r3 alpha builds for PPC and x64 from rebolsource.net but they're from 2013. There are sometimes daily builds of renc which are uploaded to S3 including x64 OSX from Travis-ci.
Low number of users doesn't mean dead. A Rebol 3 version now compiles to wasm. You can check the interpreter running in a browser at hostilefork.com/media/shared/replpad-js/
You've probably forgotten but at one stage the red.r script was ported to ren-c.