[roderickm]

park.io discloses that they buy some names for their own portfolio. Whether disclosure makes it appear less disingenuous is in the eye of the beholder.

In their FAQ, park.io writes that one of the reasons an expiring name might not be listed is "because we intend to order this domain for our own portfolio. We don't do this often, but every once in a while there is a domain we want for our own collection and so we do not list it on park.io."