I remember being really impressed by REBOL, I thought it was a really cool language and I did make some small tools with it. To bad greed ruined it for everybody.
how did greed ruin it?
I had tried it out a bit earlier, but don't remember reading anything about it getting ruined.
As I remember it; it was free for personal use, but if you were to use it commercially, you had to pay a license cost. There also was a server version which could set you back thousands of dollars. If you wanted to export the REBOL API which you could create using the REBOL SDK to users, you needed a separate distribution license. It was a mess. When REBOL finally went open source in 2012, it was too late, everyone had moved on.
I sure hope that merely not being free, for all uses, forever, would be enough to tank it. Not to hate on Rebol specifically nor people wanting to make money off their work in general but a non-free language is just unacceptable.