All our ads are labelled. This is not an ad, and no one paid me or Boing Boing to post it. I found it (as they post says) on Oh Gizmo, thought it looked good, and posted it.
I always note when review units are provided, and disclose any interest I have in the stuff we post about (for example, if I serve on the board of a nonprofit we mention, or am an advisor to a company).