Last I checked, they didn't write Perl. Activestate can do whatever they like legally with the Perl installer, but that doesn't mean that I should like it or think that it's a good idea. For me, them trying to turn something free that built their company into something that people think they have to pay for is a bad idea.

UPDATE:
I'm really glad that Larry didn't think that way.

UPDATE2:
Hmmm.... Don't remember writing "they did write perl", but they didn't write perl. Fixed it.