I understand the reasoning as described by Davo and Helen, and the suggestion of tweaking one's profile to show "available for work" is also reasonable; this is what I have done with my LinkedIn profile headline.
However, it means that the job provider does not have the same easy access to the information they need as the job seeker does via the Moodle jobs listings. In this sense, it seems to be an artificially inefficient information exchange, which goes against the spirit of openness, as John says.
In my own case, it would be clear that my interest would not be to go against official Moodle Partners -- I could not compete in terms of resources and range of services -- on the contrary, I could be an interesting recruit for a Moodle Partner. The free/libre exchange of information thereby benefits all parties.
How does this sound?