Maybe shonorio could clarify, but I read that a little differently. My interpretation is that customers are asking them how to hide code via compilation or obfuscation, and the response is to use legal protection or just not worry about it by distributing code as open source, since there aren't many practical technical options and Perl isn't built to be obscured in that particular way.
And I think the question is "how do people make money like this?"
Again, clarification from shonorio would be good.