After using free languages for so many years, I can't switch back to a proprietary one.
Yes this is/was a problem. I left it 10 years ago because of closeness. Well now with R3 it's far far more open (I know that for some "more" open is enough though).
I wrote web scrappers in Rebol before I moved to Perl and LWP. A nify little thing, I shelf it along with Factor as impressive little languages I will probably not use again.
Funny that you mention Factor :) Programming in Factor made me really get REBOL (after 10 years) and then I returned to it for most of my work.