Ironically the French NWT translated "peddlers" as "colporteurs," which was precisely the former title (copied from the terminology of late 19th-century Bible societies I guess) for the WT "pioneers".
This sometimes led to strange situations, such as using this text (and even showing it to the "householder") as an excuse to trespass "interdit aux colporteurs" signs -- "see, we are not colporteurs!" But at the same time, in areas where the police would interfere with the door-to-door activity, COs would encourage local JWs to declare their activity by filling an official "déclaration de colportage" form, and then some would "conscientiously object" because of this verse... (far memories from the early 70s).
As a side note, the Greek verb (which occurs only once in the NT) was a classic term of polemics among popular philosophers, accusing each other to "sell their stuff" for personal benefits and complying with the audience's demand. Paul uses it against Jewish-Christian "missionaries," just as he boasts of not living off his audience as they did (e.g. 1 Corinthians 9, where he seems to acknowledge that their stance rested on a "Lord" tradition, v. 14), relying instead on the support of wealthy private sponsors. These different ways of funding "Christian missions" of course influenced the contents of the "Gospels" they preached and the resulting church structures. The Jewish-Christian missionaries and their message had to be accepted by communities, whereas the Pauline mission had to please its "stockholders"first (cf. the charges against the "rich" in the blatantly anti-Pauline epistle of James). The WT system actually corresponds to neither, inasmuch as both "communities" and "wealthy supporters" have lost their control to an impersonal "organisation," which authoritatively rules everything.